In conclusion, Amy used a snowball sampling method to collect data for her survey. This method is useful when the population is hard to locate or identify, and when other sampling methods are not possible
Amy used a snowball sampling method. Snowball sampling is a non-probability sampling method where the participants recruit other members of the population.
It is useful when the population is difficult to locate or identify, as it relies on word of mouth or referrals from already recruited participants. In this case, Alfred was able to introduce other international students who might be interested in participating in Amy's survey. This allowed Amy to collect enough data to conduct her analysis. Snowball sampling is useful when the sample size is not known, when time is limited, or when a random selection is not possible.
for such more questions on sampling method
https://brainly.com/question/31017200
#SPJ11
01.(+3) + (+8)
02.(-20) + (-13)
The answer to this question is:
01. (+11)
02. (-33)
The positive integers are added directly to the positive integers as in 01 solutions 3+8 gives 11
where else in the 02 solutions both the integers are negative and when negative integers are added to each other it is added but the sign remains negative (-20)+(-13) gives (-33).
The other formulas are:
(+) × (+) = +; (+) ÷ (+) = +
(-) × (-) = +; (-) ÷ (-) = +
(+) × (-) = -; (+) ÷ (-) = -
(-) × (+) = -; (-) ÷ (+) = -
Answer:
[tex]01.(+3) + (+8) = +11)[/tex]
[tex]02.(-20) + (-13) = (-33)[/tex]
based on an upward-sloping normal yield curve as shown, which of the following statements is correct?there is a positive maturity risk premium.inflation must be expected to increase in the future.
The answer of the given question based on the an upward-sloping normal yield curve the answer is there is a positive maturity risk premium.
What is Curve?In mathematics and geometry, curve is continuous and smooth line or path that can be described using the mathematical equations or functions. Curves can be of different shapes and sizes, like straight lines, circles, ellipses, parabolas, hyperbolas, and more complex shapes.
Based on an upward-sloping normal yield curve, the correct statement would be: there is a positive maturity risk premium.
The maturity risk premium is the additional return that investors require to hold a longer-term bond instead of a shorter-term bond. In an upward-sloping normal yield curve, longer-term bonds have higher yields than shorter-term bonds, indicating that investors are demanding a higher return to hold longer-term bonds.
This additional return, or maturity risk premium, compensates investors for the risk that interest rates may rise in the future, which would cause the value of longer-term bonds to decline more than shorter-term bonds. Therefore, a positive maturity risk premium indicates that investors expect interest rates to rise in the future.
However, the shape of the yield curve alone does not provide information on future inflation expectations. Other factors such as economic growth, monetary policy, and geopolitical events can also influence interest rates and inflation expectations.
To know more about Equation visit:
https://brainly.com/question/12788590
#SPJ1
This is 2/6 problems finish them all each is 10 points 60 total.
A life insurance salesman operates on the premise that the probability that a man reaching his sixtieth birthday will not live to his sixty-first birthday is 0.05. On visiting a holiday resort for seniors, he sells 12 policies to men approaching their sixtieth birthdays. Each policy comes into effect on the birthday of the insured, and pays a fixed sum on death. All 12 policies can be assumed to be mutually independent. Provide answers to the following to 3 decimal places. a) What is the expected number of policies that will pay out before the insured parties have reached age 61? b) What is the variance of the number of policies that will pay out before the insured parties have reached age 61? c) What is the probability that at least two policies will pay out before the insured parties have reached age 61?
The probability that at least two policies will pay out before the insured parties have reached age 61 is 0.3400.
The answer is as follows: The expected number of policies that will pay out before the insured parties have reached age 61 isE(x) = np = 12 × 0.05 = 0.6Therefore, the expected number of policies that will pay out before the insured parties have reached age 61 is 0.6.b) The variance of the number of policies that will pay out before the insured parties have reached age 61 isVar(x) = np(1-p) = 12 × 0.05(1-0.05) = 0.570Therefore, the variance of the number of policies that will pay out before the insured parties have reached age 61 is 0.570.c) To find out the probability that at least two policies will pay out before the insured parties have reached age 61, we can use the complement rule that is:P(X ≥ 2) = 1 - P(X < 2) = 1 - P(X = 0) - P(X = 1)P(X = 0) = (0.95)^12 = 0.2835 (probability that none of the 12 policies will pay out before the insured parties have reached age 61)P(X = 1) = 12C1(0.05)(0.95)^11 = 0.3765 (probability that only one of the 12 policies will pay out before the insured parties have reached age 61)Therefore,P(X ≥ 2) = 1 - P(X = 0) - P(X = 1) = 1 - 0.2835 - 0.3765 = 0.3400Therefore, the probability that at least two policies will pay out before the insured parties have reached age 61 is 0.3400.
Learn more about Probability
brainly.com/question/29381779
#SPJ11
Mark has a key ring with 10 similar keys. Three are for gym lockers, 2 are car keys, 1 is a door key, and 4 are for tool boxes. If Mark selects one key without looking, what is the probability he selects a car key or door key? ling | url
The probability that Mark selects a car key or door key is 0.3
Mark has a total of 10 keys, and he is equally likely to select any one of them. Out of these 10 keys, there are 2 car keys and 1 door key. Therefore, the probability that he selects a car key or door key is the sum of the probabilities of selecting a car key and a door key.
The probability of selecting a car key is 2/10 or 1/5, since there are 2 car keys out of 10 keys.
Similarly, the probability of selecting a door key is 1/10, since there is only one door key out of 10 keys.
Therefore, the probability of selecting a car key or door key is:
P(car key or door key) = P(car key) + P(door key)
= 1/5 + 1/10
= 3/10
= 0.3
Learn more about probability here
brainly.com/question/11234923
#SPJ4
There are 32 stamps.on each roll. Mark has 288 stamps. How many rolls does he have?
Answer:
9
Step-by-step explanation:
No. of rolls Mark have =
[tex] \frac{288}{32} = 9[/tex]
pls mrk me brainliest
You may use the following formula: Area = length x breadth Mrs Sereme wants to bake 85 scones. Calculate how many baking pns of scones will she make if each scones' dimensions are 4cm x 4 cm.
Answer: Divide the amount that she wants to bake by the dimensions
Step-by-step explanation:
Area of 1 cone =4 times 4= 16cm squared
85/16=5.3125=5 rounded to a whole number
look at the attached file
let's recall that Bearing is always a clockwise angle using the North Line, so "of X from Y", means we draw a North line at Y and a line towards X, clockwise is our angle. Check the picture below.
a tank 12m long, 8m wide and 5m deep is to be made. it is open at the top, determine the iron sheet required for the fabrication. also find volume in litres
Answer:
Surface area of the sheet: 296 square meters
Area of tank: 480 cubic meters
Step-by-step explanation:
Don't forget your units!
"determine the iron sheet required for the fabrication" is asking for the surface area of the rectangular prism.
This is found by adding the five sides of the prism. The top side is excluded because it is open.
Front and back: 2(12m * 5m) = 120m^2
Left and right: 2(8m * 5m) = 80m^2
Floor: (12m * 8m) = 96m^2
120m^2 + 80m^2 + 96m^2 = 296m^2
The volume is found using standard methods. The open top does not have an impact here.
12m * 8m * 5m = 480m^3
Ina and Lane share a 24-ounce bucket of clay. By the end of the week, Gina has used
3
8
of the bucket, and Lane has used
1
4
of the bucket of clay. How many ounces are left in the bucket?
9 ounces are left in the bucket. The solution has been obtained by using the arithmetic operations.
What are arithmetic operations?
It is asserted that the four basic operations, usually referred to as "arithmetic operations," can explain all real numbers. Quotient, product, sum, and difference are the next four mathematical operations after division, multiplication, addition, and subtraction.
We are given that Gina and Lane share a 24-ounce bucket of clay.
Gina has used [tex]\frac{3}{8}[/tex] of the bucket of clay.
So, we get
[tex]\frac{3}{8}[/tex] of 24 = 9 ounces
Similarly, Lane has used [tex]\frac{1}{4}[/tex] of the bucket of clay.
So, we get
[tex]\frac{1}{4}[/tex] of 24 = 6 ounces
Using the addition operation, we get
Total clay used = 9 + 6 = 15 ounces
Now, using the subtraction operation, we get
Ounces left = 24 - 15 = 9 ounces
Hence, 9 ounces are left in the bucket.
Learn more about arithmetic operations from the given link
https://brainly.com/question/30283549
#SPJ1
Question: Gina and Lane share a 24-ounce bucket of clay. By the end of the week, Gina has used 3/8 of the bucket, and Lane has used 1/4 of the bucket of clay. How many ounces are left in the bucket?
Sue is playing darts. So far, she has hit the bullseye 4 times and missed the bullseye 10 times. What is the experimental probability that Sue will hit the bullseye on her next toss?
The experimental probability that Sue will hit the bullseye on her next toss is 2/7.
What is the experimental probability?
The proportion of outcomes where a specific event occurs in all trials, not in a hypothetical sample space but in a real experiment, is known as the empirical probability, relative frequency, or experimental probability of an event.
Here, we have
Given: Sue is playing darts. So far, she has hit the bullseye 4 times and missed the bullseye 10 times.
We have to find the experimental probability that Sue will hit the bullseye on her next toss.
experimental probability = 4/(4+10) = 4/14 = 2/7
The next toss = P = 2/7
Hence, the experimental probability that Sue will hit the bullseye on her next toss is 2/7.
To learn more about the experimental probability from the given link
https://brainly.com/question/8652467
#SPJ1
This is 5/6 problems finish them all each is 10 points 60 total.
The value of angle X in the given right triangle HXV is 59.5 ⁰.
What is the value of x in the right triangle?The value of angle X in the given right triangle HXV is calculated by applying SOH CAH TOA identity as shown below.
SOH ⇒ sin θ = opposite side / hypothenuse side
CAH ⇒ cos θ = adjacent side / hypothenuse side
TOA ⇒ tan θ = opposite side / adjacent side
For the given triangle HXV, the value of angle X is calculated as follows;
cos X = 33 / 65
cos X = 0.5077
X = arc cos ( 0.5077 )
X = 59.5 ⁰
Learn more about right triangle here: https://brainly.com/question/20734777
#SPJ1
Given: PP(xx) = x^3−2x^2 + 9x−18
a) How many roots does P(x) have?
b) What are the possible rational roots?
c) Find all the roots.
a) Number of roots in the given polynomial is three.
b) Possible rational roots of the given polynomial are {±1, ±2, ±3, ±6, ±9, ±18}
c) The roots of the given polynomial are {2, 3i, -3i}.
Given polynomial is `P(x) = x³ - 2x² + 9x - 18`.a) Number of roots in the given polynomial is three. b) Possible rational roots of the given polynomial are expressed in the form of `p/q`, where p is a factor of the constant term `-18` and q is a factor of the leading coefficient `1`.Constant term of the given polynomial is `-18`. The factors of `-18` are 1, 2, 3, 6, 9, and 18. Leading coefficient of the given polynomial is `1`. The factors of `1` are ±1.∴ Possible rational roots of the given polynomial are {±1, ±2, ±3, ±6, ±9, ±18}.c) Let us check whether the possible rational roots satisfy the given polynomial. To check the roots, we can use synthetic division, which is an efficient method to check the roots of a polynomial. When `x = -1` is substituted in the given polynomial, we get P(-1) = (-1)³ - 2(-1)² + 9(-1) - 18= -1 + 2 - 9 - 18= -26, which is not equal to `0`.When `x = 1` is substituted in the given polynomial, we get P (1) = 1³ - 2(1)² + 9(1) - 18= 1 - 2 + 9 - 18=-10, which is not equal to `0`.
When `x = -2` is substituted in the given polynomial, we get P(-2) = (-2)³ - 2(-2)² + 9(-2) - 18= -8 + 8 - 18 - 18= -36, which is not equal to `0`.When `x = 2` is substituted in the given polynomial, we get P(2) = 2³ - 2(2)² + 9(2) - 18= 8 - 8 + 18 - 18= 0, which is equal to `0`.∴ `x = 2` is a root of the given polynomial. By using synthetic division method, we can find the remaining two roots. x - 2 | 1 - 2 9 - 18| | 2 0 18| | 1 0 9 0|Therefore, the factors of the given polynomial are `(x - 2)(x² + 9)`.The quadratic factor, `x² + 9`, does not have any real roots, as the discriminant is negative.∴ The roots of the given polynomial are {2, 3i, -3i}.
Learn more about Roots
brainly.com/question/16932611
#SPJ11
(09.02 MC)
Which equation could be used to solve for the measure of angle P?(1 point)
Circle N is shown with a quadrilateral OPQR inscribed inside it. Angle O is labeled x degrees. Angle P is labeled y degrees. Angle Q is labeled z degrees. Angle R is labeled w degrees.
In order to solve for the measure of angle P, the equation x + y + z + w = 360° can be used.
What is an angle?An angle is the figure formed by two rays, called the sides of the angle, sharing a common endpoint, called the vertex of the angle. Angles are measured in degrees or radians and are used to describe the direction of two intersecting lines in a plane. Angles are also used to measure the central angle of a circle and the angle between two curves.
This equation is known as the Angle Sum Theorem, which states that the sum of the measures of the angles of a triangle or a quadrilateral equals 360°. The measure of each angle of the quadrilateral can be used in the equation to solve for the measure of angle P, which is labeled as y. This equation can be written as x + y + z + w = 360° and then solved for the measure of angle P by subtracting x + z + w from both sides of the equation. This would result in y = 360° - (x + z + w). By substituting the measure of each angle into the equation, the measure of angle P can be found.
For more questions related to vertex
https://brainly.com/question/25651698
#SPJ9
Same facts as in #3, except now Elaine can set aside $50 per month. What rate of return does she need on her account? _____
The rate of return that Elaine needs on her account is of 22.16% to reach her goal of $4,000 in 4 years.
To calculate the rate of return for a savings account, you can use the formula:
Rate of return = [tex](Ending balance / Beginning balance)^{(1/n) - 1}[/tex]
where n is the number of years.
In Elaine’s case, she needs to save up $4,000 in 4 years. If she can set aside $50 per month, she will have saved $2,400 in 4 years. To calculate the rate of return she needs on her account, we can use the formula above.
To calculate the rate of return she needs on her account, we can use the formula above.
Let’s assume that she has $0 in her account at the beginning of the 4 years and $2,400 at the end of the 4 years.
Rate of return = [tex](2400 / 0)^{(1/4) - 1}[/tex]
= [tex](2400)^{(1/4) - 1}[/tex]
= 0.2216 or 22.16%
Therefore, Elaine needs a rate of return of 22.16% on her account to reach her goal of $4,000 in 4 years.
Keep in mind that this is a very high rate of return and may not be achievable with a savings account.
To know more about rate of return, refer:
https://brainly.com/question/24301559
#SPJ4
Complete question is:
Elaine needs to save up $4,000 in 4 years. If she can set aside $50 per month, what rate of return does she need on her account?
Verifying Inverse Functions In Exercises 17-20, verify thatfandgare inverse functions algebraically. 17.f(x)=4x−9,g(x)=4x+9. 18.f(x)=−3/2x−4,g(x)=−2x+8/3. 19.
f(x)= x^3/4, g(x)=
f and g are inverse functions
17. To verify that f and g are inverse functions, we need to show that f(g(x)) = x and g(f(x)) = x.
So, f(g(x)) = f(4x+9) = 4(4x+9)−9 = 16x+4−9 = 16x−5 = x.
Similarly, g(f(x)) = g(4x−9) = 4(4x−9)+9 = 16x−5+9 = 16x+4 = x.
Therefore, f and g are inverse functions.
18. To verify that f and g are inverse functions, we need to show that f(g(x)) = x and g(f(x)) = x.
So, f(g(x)) = f(−2x+8/3) = −3/2(−2x+8/3)−4 = 6x−4−4 = 6x−8 = x.
Similarly, g(f(x)) = g(−3/2x−4) = −2(−3/2x−4)+8/3 = 3x−2+8/3 = 3x+8/3 = x.
Therefore, f and g are inverse functions.
19. To verify that f and g are inverse functions, we need to show that f(g(x)) = x and g(f(x)) = x.
So, f(g(x)) = f(x3/4) = x3/44 = x3/256 = x.
Similarly, g(f(x)) = g(x4) = x4/4 = x3/4 = x.
Therefore, f and g are inverse functions.
Learn more about Inverse Functions
brainly.com/question/17872426
#SPJ4
Is 0.403 bigger than 0.043
Yes, 0.403 is bigger than 0.043. This is because 0.403 is 10 times bigger than 0.043, since 0.403 is four hundred and three thousandths and 0.043 is forty-three thousandths.
What is bigger?It is impossible to answer this question without more context. Depending on what is being compared, one thing may be bigger than another. For example, if comparing two numbers, the larger number would be considered bigger. If comparing two physical objects, the larger object would be considered bigger.
An easy way to check is to look at the number of digits after the decimal point; 0.403 has three digits, while 0.043 has two. This indicates that 0.403 is bigger.
To learn more about bigger
https://brainly.com/question/344752
#SPJ1
Two times the sum of 5 and some number is 30. What is the number?
Answer:
10
Step-by-step explanation:
5+10=15
15×2=30
so the answer to your question is 10
Answer:
x = 10.
Step-by-step explanation:
Given: Two times the sum of 5 and some number is 30. What is the number?
First, write the equation:
2(5 + x) = 30
Simplify the brackets with distribution property:
10 + 2x = 30
Then collect like terms:
2x = 30 - 10
Finally, calculate:
2x = 20 (Divide both sides by 2)
x = 10
Suppose a point has polar coordinates (4, - (3pi)/4) with the angle measured in radians. Find two additional polar representations of the point. Write each coordinate in simplest form with the angle in [- 2pi, 2pi]
If a point has polar coordinates (4, - (3pi)/4) with the angle measured in radians, two additional polar representations of the points are (4, 5pi/4) and (4, -11pi/4)
To find two additional polar representations of the point (4, - (3pi)/4), we need to add and subtract integer multiples of 2pi from the angle measure while keeping the same radius.
First, let's add 2pi to the angle measure:
(4, - (3pi)/4 + 2pi) = (4, 5pi/4)
This gives us a new polar representation of the same point with a positive angle measure within the interval [-2pi, 2pi].
Next, let's subtract 2pi from the angle measure:
(4, - (3pi)/4 - 2pi) = (4, -11pi/4)
This gives us another polar representation of the same point with a negative angle measure within the interval [-2pi, 2pi].
Therefore, the three polar representations of the point (4, - (3pi)/4) are:
(4, - (3pi)/4)
(4, 5pi/4)
(4, -11pi/4)
Each of these polar representations describes the same point in the polar coordinate system, but with a different angle measure.
To learn more about polar coordinates click on,
https://brainly.com/question/29091778
#SPJ4
Mei got scores of 76,80, and 78 on her last three history exams. Write an inequality to determine the score, x, she needs on the next exam so that her average is at least 82.
Mei needs to score at least 94 on her next history exam to have an average of at least 82.
What is the least score that Mei needs on the next exam so that her average is at least 82?Let's call the score that Mei needs on her next exam "x".
To find her average score, we need to add up all four scores (including the score she hasn't taken yet) and divide by 4:
(76 + 80 + 78 + x) / 4
Now, we want this expression to be greater than or equal to 82, so we can write the following inequality:
(76 + 80 + 78 + x) / 4 ≥ 82
Multiplying both sides by 4 to eliminate the fraction, we get:
76 + 80 + 78 + x ≥ 328
Simplifying the left side, we get:
234 + x ≥ 328
Subtracting 234 from both sides, we get:
x ≥ 328 - 234
x ≥ 94
Therefore, the least score neeeded on her next history exam is 94.
Learn more about inequality here: https://brainly.com/question/30231190
#SPJ1
How is 0.136¯¯¯¯ written as a fraction in simplest form?
Enter your answer in the box.
ANSWER QUICK FOR 50 POINTS
Answer:
17/125
Step-by-step explanation:
0.136×1000÷1×1000=136/1000
136/1000=17/125
four minus three times a number is less than twenty-five
Answer:
the answer could be: 1,2,3,4,5,6,7. If you are not sure about the answer than substitute the number that you pick and solve as if it was a normal equation.
Step-by-step explanation:
4-(3*x)<25
example:
4-(3*1)<25
4-3<25
1<25
I need help with please as fast as possible
RT is equal to 46 and angle ∠VUT is 26°.
What is a quadrilateral?A quadrilateral is a fοur-sided pοlygοn with fοur edges and fοur cοrners in geοmetry. The name cοmes frοm the Latin wοrds quadri, a variatiοn οf fοur, and latus, which means "side."
Tο find x nοte that the diagοnals οf a rectangle are cοngruent. This means that RT = SU.
So, 3x + 8 = 6x - 7
8 + 7 = 6x - 3x
3x = 15
x = 15/3
x = 5
RT = 2RV
= 2(3x + 8)
= 2(3(5) + 8)
= 2(15+ 8)
= 2(23)
= 46
Thus, RT is equal to 46
For m∠VUT,
Given ∠VRU = 64°
Using complementary angles
64° + ∠VRS = 90°
∠VRS = 90° - 64°
∠VRS = 26°
Now, using alternate angle theory as RT is a transverse
∠VRS = ∠VTU = 26°
Now, as the diagonals are congruent ∠VTU = ∠VUT
∠VUT = 26°
Thus, RT is equal to 46 and angle ∠VUT is 26°.
Learn more about Quadrilaterals:
brainly.com/question/23935806
#SPJ1
Sol has to paint 365. 7 square feet of wall space. He wants to paint 0. 4 of the area light green. How many square feet does he want to paint light green?
Sol wants to paint 146.28 square feet of the wall light green.
The problem states that Sol has to paint 365.7 square feet of wall space, but he wants to paint only a fraction of the total area light green. The fraction he wants to paint light green is given as 0.4.
To find out how many square feet of the wall he wants to paint light green, we need to multiply the total area of the wall by the fraction of the area he wants to paint light green.
So, we can calculate the area of the wall that Sol wants to paint light green as:
Area of wall to be painted light green = 0.4 x 365.7
= 146.28 square feet
Learn more about area here
brainly.com/question/29624642
#SPJ4
Find three consecutive even integers if 3 times the first iteger is 2 times the the third
The solution is that the three consecutive even integers are 8, 10, and 12.
Let's assume the first even integer to be x. Since we are looking for three consecutive even integers, the second even integer will be x + 2, and the third even integer will be x + 4.
According to the problem statement, 3 times the first even integer is equal to 2 times the third even integer, which can be written mathematically as:
3x = 2(x + 4)
Solving for x, we get:
3x = 2x + 8
x = 8
Therefore, the first even integer is 8, and the second and third even integers are 10 and 12, respectively.
We can verify that 3 times the first even integer is indeed equal to 2 times the third even integer:
3(8) = 24
2(12) = 24
To learn more about consecutive even integers
https://brainly.com/question/26438608
#SPJ4
please i need help ASAP it geometry!!
Answer: 12
The answer to your geometry question is 12, I hope this helps.
A table costs five times as much as a chair. A trader bought six more chairs than tables and spent $18 594. If a chair costs $1033,how many chairs and tables did he buy
The trader bought 3 512 tables and 6(3 512) = 21 072 chairs.A table costs five times as much as a chair.
The cost of a chair is given as $1033. So, c = 1033Substituting c = 1033 in 5t + 1033 = 18 594,5t = 18 594 - 1033 5t = 17 561 t = 17 561/5 t = 3512.2Let c be the number of chairs and t be the number of tables.As the table costs 5 times as much as the chair, the total cost of the tables is 5t. The total cost of the chairs is c. The total cost of the tables and chairs is 5t + c = $18 594.Therefore, 5t + c = 18 594.The cost of a chair is given as $1033. So, c = 1033Substituting c = 1033 in 5t + 1033 = 18 594,
5t = 18 594 - 1033 5
t = 17 561
t = 17 561/5
t = 3512.2Therefore, the trader bought 3 512 tables and 6(3 512) = 21 072 chairs.
Learn more about cost here:
https://brainly.com/question/19075809
#SPJ4
Compute the expected age of a super shopper. (Round your answer to two decimal places. )
(A) The expected age μ of a super shopper 41.81
and, (B) the standard deviation σ for ages of super shoppers is 12.67
Given the data:
Age range, years 18-28 29-39 40-50 51-61 62 and over
Midpoint (x) 23 34 45 56 67
Percent of super shoppers 9% 46% 22% 11% 12%
Midpoint, x : 23 34 45 56 67
Frequency, f : 0.09_ 0.46 _ 0.22 __0.11 __ 0.12
The mean (m)= Σfx / Σf
= [(23 × 0.09) + (34 × 0.46) + (45 × 0.22) + (56 × 0.11) + (67 × 0.12)] ÷
(0.09 + 0.46 + 0.22 + 0.11 + 0.12)
= 41.81 / 1
Therefore, Mean = 41.81
Standard Deviation:
The standard deviation (or σ) is a measure of the distribution of data from the mean. A low standard deviation means the data is clustered around the mean, and a high standard deviation means the data is more scattered.
Standard deviation = Sqrt[(Σ(X² * f) / Σf) - m²)]
= ((23²× 0.09) + (34²× 0.46) + (45²× 0.22) + (56²× 0.11) + (67²× 0.12)) / 1
1908.51 - 41.81^2
= √(160.4339)
= 12.666250
= 12.67
Complete Question:
Age range, years 18-28 29-39 40-50 51-61 62 and
over Midpoint x 23 34 45 56 67
Percent of super shoppers 9% 46% 22% 11% 12%
For the 62-and-over group, use the midpoint 67 years.
(a) Compute the expected age μ of a super shopper. (Round your answer to two decimal places.)
μ = yr
(b) Compute the standard deviation σ for ages of super shoppers. (Round your answer to two decimal places.)
σ = yr
Learn more about Standard Deviation:
https://brainly.com/question/23907081
#SPJ4
Li-ming received a statement on her Certificate of Deposit showing that her investment had returned $2,240
$
2
,
240
over its life. If the Certificate of Deposit pays a simple interest rate of 3.2%
3.2
%
and her initial investment was $20,000
$
20
,
000
, how long had the money
Li-ming's initial investment was $20,000, the interest rate was [tex]3.2[/tex] % (or 0.032 as a decimal), and the total interest earned was $ [tex]2,240[/tex] .
What is the deposit pays a simple interest rate?We can use the formula for simple interest to solve for the time:
Simple Interest [tex]= Principal \times Rate \times Time[/tex]
where Principal is the initial investment, Rate is the interest rate, and Time is the time period.
In this case, we know:
Principal = $[tex]20,000[/tex]
Rate = [tex]3.2[/tex] %
Simple Interest = $ [tex]2,240[/tex]
Substituting these values into the formula, we get:
$ [tex]2,240 = $20,000 \times 0.032 \times Time[/tex]
Simplifying the equation, we get:
Time = $ [tex]2,240 / ($20,000 \times 0.032)[/tex]
Time [tex]= 3.5[/tex] years (rounded to one decimal place)
Therefore, Li-ming's money was invested for 3.5 years to earn a simple interest of $ [tex]2,240[/tex] at a rate of [tex]3.2[/tex] %.
Learn more about interest here:
https://brainly.com/question/13324776
#SPJ9
Help pls
(2.75 x 10-2) (2.5 × 108) X
Multiplying two numbers written in scientific notation can be done by multiplying their coefficients and adding their exponents, such as [tex](2.75 x 10^-2)[/tex] x [tex]10^(-2+8)[/tex] = [tex]6.875 x 10^6[/tex].
What does an expression mean?
Instead of using estimates produced at random, it is better to use rolling integer variables that can be increasing, decreasing, or blocking. They could only help one another by sharing tools, information, or solutions to issues.
In the given question,
(2.75 x [tex]10^-2[/tex]) (2.5 × [tex]10^8[/tex]) X
To multiply two numbers written in scientific notation, you can simply multiply their coefficients and add their exponents. So:
(2.75 x [tex]10^-2[/tex]) (2.5 × [tex]10^8[/tex]) = (2.75 x 2.5) x [tex]10^(-2+8)[/tex] = 6.875 x [tex]10^6[/tex]
The result is 6.875 x 10⁶, which is the sum of (2.5 x 10⁸) and (2.75 x 10⁻²).
To know more about exponents visit :-
brainly.com/question/15993626
#SPJ1