Answer:
The value is [tex]p-value = 0.0297[/tex]
Step-by-step explanation:
From the question we are told that
The population mean is [tex]\mu = 420 \ g[/tex]
The The sample size is [tex]n = 49[/tex]
The sample mean is [tex]\= x = 413 \ g[/tex]
The population variance is [tex]\sigma^2 = 676[/tex]
Generally the population standard deviation is mathematically represented as
[tex]\sigma = \sqrt{\sigma^2 }[/tex]
[tex]\sigma = \sqrt{676}[/tex]
[tex]\sigma = 26[/tex]
The null hypothesis is [tex]H_o : \mu = 420 \ g[/tex]
The alternative hypothesis is [tex]H_a : \mu < 420 \ g[/tex]
Generally the test statistics is mathematically represented as
[tex]z = \frac{ \= x - \mu }{ \frac{ \sigma }{\sqrt{n} } }[/tex]
=> [tex]z= \frac{ 413 - 420 }{ \frac{ 26 }{\sqrt{49} } }[/tex]
=> [tex]z = -1.884[/tex]
The p-value is obtained from the z-table table and the value is
[tex]p-value = P(Z < -1.885) = 0.029715[/tex]
[tex]p-value = 0.0297[/tex]
8+9t-3+4 please help me
Answer:
t = -1
Step-by-step explanation:
8 + 9t - 3 + 4
Combine like terms
(8 - 3 + 4) + 9t
9 + 9t
9t + 9
Get t by itself
9t + 9 = 0
-9 -9
9t = -9
Divide both sides by 9 to find t
t = -1
1) A swimming pool currently has 1,500 gallons of water in it and is filling at a rate of two gallons per hour. How many gallons will the pool hold in eight hours?
Answer:
1516 Gallons
Step-by-step explanation:
For this problem, we will simply take the initial amount of water, 1500 gallons, and add the extra water after eight hours.
So if the pool is filling at a rate of 2 gallons per hour, and 8 hours pass by, then the pool will have filled an additional 16 gallons. (2 * 8 = 16).
Then, we add the initial amount of 1500 gallons to the additional 16 gallons to get the amount of water in the pool after 8 hours.
The total the pool is holding is 1516 gallons after 8 hours.
Cheers.
Two numbers are independently selected from the set of positive integers less than or equal to 5. What is the probability that the sum of the two numbers is less than their product? Express your answer as a common fraction.
Answer: P = 15/25
Step-by-step explanation:
The set of numbers that we have here is:
{1, 2, 3, 4, 5}
We select independently two numbers of that set (so the numbers can be repeated.
We want to find the probability where the sum of the numbers is less than the product.
if one of the selected numbers is 1, then always the sum will be larger than the product, because:
1*1 = 1 and 1 + 1 = 2
1*2 = 2 and 1 + 2 = 3.
and so on.
if both numbers are 2, the sum is equal to the product:
2*2 = 4 = 2 + 2.
if else, the product will be larger than the product.
The first step now is to calculate the total number of possible combinations of 2 numbers:
For the first number, we have 5 options.
for the second number, we have 5 options.
The total number of combinations is equal to the product of the number of options in each case:
C = 5*5 = 25
Now, the combinations where the product is LESS OR EQUAL than the sum are:
1 and 1
1 and 2
1 and 3
1 and 4
1 and 5.
2 and 1
3 and 1
4 and 1
5 and 1
2 and 2.
10 combinations.
Then the combinations where the product is larger than the sum is:
25 - 10 = 15.
Then the probability that we are looking for is:
P = 15/25
A rectangular athletic field is twice as long as it is wide. If the perimeter of the athletic field is 270 yards what are it’s dimensions?
Answer:
Step-by-step explanation:45x90
You have a choice between going to an in-state college where you would pay $5500 per year for tuition and an out-of-state college where the tuition is $7000 per year. The cost of Iiving is much higher at the in-state college, where you can expect to pay $1000 per month in rent, compared to $750 per month at the other college Assuming all other factors are equal, which is the less expensive choice on an annual (12-month) basis? The yearly expense of the in-state college is $_____and the yearly expense of the out-of-state college is $______. Thus on an annual basis, the less expensive choice is the (1)_______college. (Simplify your answers.) in-state out-of-state
The yearly expense of the in-state college is $16000.
We are given that;
An out-of-state college where the tuition = $7000 per year.
Now,
The yearly expense of the in-state college is:
=5500+12⋅1000
=5500+12000
=17500
By solving;
The yearly expense of the out-of-state college is:
=7000+12⋅750
=7000+9000
=16000
So, on an annual basis, the less expensive choice is the out-of-state college.
Therefore, by algebra the answer will be 16000.
More about the Algebra link is given below.
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For each of the following studies, identify the source(s) of sampling bias and describe (i) how it might affect the study conclusions and (ii) how you might alter the sampling method to avoid the bias.
(a) To study the size distribution of rock cod (Epinephelus puscus) off the coast of southeastern Australia, scientists recorded the lengths and weights for all cod captured by a commercial fishing vessel on one day (using standard hook-and-line fishing methods).
(b) A nutritionist is interested in the eating habits of college students and observes what each student who enters a dining hall between 8:00 A.M. and 8:30 A.M. chooses for breakfast on a Monday morning.
(c) To study how fast an experimental painkiller relieves headache pain residents of a nursing home who complain of headaches are given the painkiller and are later asked how quickly their headaches subsided.
Answer:
Answer:
A first of all because the sample involves only rock cods that voluntarily get hooked to the fishing rod, this is a major source of bias as the sample does not represent the whole general population.
Rather adopt stratified sampling stratified basing on Geographical location can be suggested for this study.
II. Because convenient sampling is adopted here data is only gotten from students that eat in the hall in a given period of time so this is a source of bias
Also one study center that is the Hall of only one school is used this is also biased and may affect the result of the study
To avoid this bias a simple random sampling where each student have an equal chance of being selected in the study should be adopted
Iii. this study is using convenient samples. and the effect of head ache medicine may be affected by other medicines too so the headache medicine cannot be the only reason for painrelief so it is better to sample rando amongst patients with headache
Determine whether the underlined number is a statistic or a parameter. a sample of seniors selected and it is found that 25% own a computer
Answer: Statistic.
Step-by-step explanation: Statistic are used to refer to numerical measurement pertaining to a sample. A sample refers to a subset of members chosen from a population, which means a smaller representation of the larger group. Hence, in the scenario above, the population is the entire seniors which makes up the group. While the sample is the subset of seniors drawn from the whole. Hence, statistical measures calculated or derived from the sample is called statistic. Hence, the 25% obtained is a statistic.
Rewrite the equation of a straight line in a slope - intercept form x + 2y + 1 = 0
Answer:
y = -x/2 -1/2
Step-by-step explanation:
[tex]x + 2y + 1 = 0\\[/tex]
Write in the y=mx+b form
[tex]2y =-x-1+0\\2y =-x-1[/tex]
Divide both sides by 2
[tex]\frac{2y}{2} =\frac{-1x}{2} -\frac{1}{2} \\\\y = -\frac{x}{2} -\frac{1}{2}[/tex]
What is the solution to the system of linear equations? Please show steps 4x + 5y = 9
−11x − 9y = −20
Step-by-step explanation:
4x + 5y = 9
-11x - 9y = -20
solution
5y = 4x - 9
divide both side by 5
5y = 4x - 9
5 5
5 cancel at the L.H.S
y = 4x-9
5
insert the value of y in equation ii above
-11x -9(4x-9) = -20
5
-11x - 36x-81 = -20
5
cross multiply at the RHS
-11x- 36x-81 = -100
-47x-81 = -100
-47x = -100+81
-47x = -19
divide both side by -47
-47x = -19
-47 -47
x =
What are the degrees of freedom associated with the factor(s) in this study design?
Answer:
The question is unclear and incomplete.
Let me explain the degrees of freedom in statistics.
Step-by-step explanation:
Statistically, degrees of freedom which is denoted as DF is the number of independent values that can vary in an analysis without breaking any constraints. It can also be referred to as the number of independent values that a statistical analysis can estimate.
Degrees of freedom also define the probability distributions for the test statistics of various hypothesis tests.
The degree of freedom has the formula:
DF = N - 1 where N number of random variables
DF = (R - 1) x (C - 1) Where R is the number of data values and C is the number of groups
7 plus another is 20
Answer:
27
Step-by-step explanation:
Answer:
the answer would 13
Step-by-step explanation:
PLEASE SOMEONE HELP IM TIMED What is 3.71 as a fraction?
Answer: 3 71/100
Step-by-step explanation:
After he bought a new car, Nelson purchased car insurance. He must pay $75 each month for the plan.Later that month, Nelson caused a car accident when he lost control of his vehicle. He was required to pay the first $500 of his repair costs, and then the insurance company covered the rest.
Read the passage about Nelson’s car insurance.
What is the $75 payment Nelson must make each month?
premium
co-payment
deductible
payout
Answer:
Premium
Step-by-step explanation:
took the test on Edge
The $75 payment that Nelson must make each month after buying the Car is called; A: Premium
What is Insurance Premium?
Insurance Premium is defined as the amount of money that one will have to pay for an insurance contract. The insurance premium simply represents the income of the insurance company concerned.
Now, the amount of premium paid for different insurance policies usually differs depending on a number of factors. However, the greater the risks associated with an insurance policy, the higher the premium that will be paid.
Since Nelson must make $75 payment each month, then that is referred to as the Premium.
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What is the product of the binomials below?
(2x +5)(3x+4)
O A. 6x² +23x +20
O B. 5x2 +23x +9
O C. 6x2 + 23x +9
O D. 5x2 +23x+20
Answer:
[tex] \boxed{ \bold{ \huge{ \boxed{ \sf{6 {x}^{2} + 23x + 20}}}}}[/tex]
Option A is the correct option.
Step-by-step explanation:
[tex] \sf{(2x + 5)(3x + 4)}[/tex]
Use the distributive property to multiply each term of the first binomial by each term of the second binomial
⇒[tex] \sf{2x(3x + 4) + 5(3x + 4)}[/tex]
⇒[tex] \sf{6 {x}^{2} + 8x + 15x + 20}[/tex]
Collect like terms
⇒[tex] \sf{6 {x}^{2} + 23x + 20}[/tex]
Hope I helped !
Best regards!!
4x + 3 x - 6 equals 29 what is X
Can you please help me with this Question if it’s right I will give you a branlist
Answer:
Second one
Step-by-step explanation:
The total length is 5 ft and Gracia has used 2 ft.
The second answer illustrates correctly the difference between 5 and 2 wich the remaining length.
● 2 + x = 5
We moved right x units
x is 3 (aftet solving the equation ir simply counting the units)
1
10 points
Simplify the expression by combining like terms.
7a - 2a - a - 13
type your answer...
Answer:
4a - 13
Step-by-step explanation:
● 7a - 2a - a - 13
● (7a - 2a - a) -13
● (5a-a) -13
● 4a -13
Given a=20 and b=a/4-3 what is the value of b
Answer: b=20
Step-by-step explanation:
Subsitute a for 20.
b=20/4-3
b=20/1
b=20
Answer:
pretty positive it’s 2
Step-by-step explanation:
if a=20 then you’d use pemdas so 20/4=5 then 5-3=2 so b=2
Which angle is supplementary to 65 degrees
Answer:
115°
Step-by-step explanation:
Supplementary angles equal 180.
180-65=115°
Answer:
[tex]\boxed{115}[/tex]
Step-by-step explanation:
Hey there!
Supplementary angles add up to 180º, so we can set up the following.
x = 180 - 65
x = 115º
Hope this helps :)
power of a product property:states that if there is more than one factor in parenthesis,within exponent _______ the parenthesis, then the exponent is distributed to every term in the parenthesis
Answer:
The answers Outside
PLEASE HELP!!! Which expression is equivelent to 32 + 16 1. 8(4+2) 2. 8(24+8) 3. 4(2+7) 4. 7(24+8)
Answer is
1. 8(4+2)
8 × 6 = 48
For the third week of July, Susan Gray worked 43 hours. Susan earns $17.70 an hour. Her employer pays overtime for all hours worked in excess of 40 hours per week and pays 1.5 times the hourly rate for overtime hours. Calculate the following for the third week of July (round your responses to the nearest cent if necessary
Answer: $787.65
explanation:
(17.70)(40) = $708
17.70 x 1.5 = 26.55
(3)(26.55) = $79.65
$708 + $79.65 = 787.65
The population of a city has increased by 27% since it was last measured. If the current population is 25400, what was the previous population
Answer:6858
Step-by-step explanation:
If angle EFH(5x+1)’ angle HFG(62 degrees) and angle EFG (18x+11) find each measurement
Answer:
∠EFH = 21°
∠HFG = 62°
∠EFG = 83°
Step-by-step explanation:
The diagram showing the angles has been attached to this response.
From the diagram, it can be deduced that;
Angle EFG = angle EFH + angle HFG
=> ∠EFG = ∠EFH + ∠HFG -------------------(i)
From the question:
∠EFH = (5x + 1)° -------------(ii)
∠HFG = 62° -------------(iii)
∠EFG = (18x + 11)° -------------(iv)
Substitute these values into equation (i) as follows;
(18x + 11) = (5x + 1) + 62
=> 18x + 11 = 5x + 1 + 62
Collect like terms and solve for x
18x - 5x = 1 + 62 - 11
13x = 52
x = 4
Now, to get each measurement, substitute x = 4 into each of equations (ii) - (iv)
∠EFH = (5x + 1)°
∠EFH = (5(4) + 1)°
∠EFH = (20 + 1)°
∠EFH = 21°
∠HFG = 62° [Does not depend on x]
∠EFG = (18x + 11)°
∠EFG = (18(4) + 11)°
∠EFG = (72 + 11)°
∠EFG = 83°
Conclusion:
∠EFH = 21°
∠HFG = 62°
∠EFG = 83°
What is 4/5 ( + ) 1/2 + ( 3/4)
Answer:
41/20
Step-by-step explanation:
Simplify the following:
4/5 + 1/2 + 3/4
Hint: | Put the fractions in 4/5 + 1/2 + 3/4 over a common denominator.
Put 4/5 + 1/2 + 3/4 over the common denominator 20. 4/5 + 1/2 + 3/4 = (4×4)/20 + 10/20 + (5×3)/20:
(4×4)/20 + 10/20 + (5×3)/20
Hint: | Multiply 4 and 4 together.
4×4 = 16:
16/20 + 10/20 + (5×3)/20
Hint: | Multiply 5 and 3 together.
5×3 = 15:
16/20 + 10/20 + 15/20
Hint: | Add the fractions over a common denominator to a single fraction.
16/20 + 10/20 + 15/20 = (16 + 10 + 15)/20:
(16 + 10 + 15)/20
Hint: | Evaluate 16 + 10 + 15 using long addition.
| 1 |
| 1 | 6
| 1 | 5
+ | 1 | 0
| 4 | 1:
Answer: 41/20
Find (a) PQ to the nearest tenth and (b) the coordinates of the midpoint of PQ.
P(2.6), Q(-6,1)
(a) PQ=(Round to the nearest tenth as needed.)
Answer/Step-by-step explanation:
Given:
P(2, 6)
Q(-6, 1)
Required:
a. PQ
b. Coordinate of the midpoint of PQ
SOLUTION:
a. [tex] PQ = \sqrt{(x_2 - x_1)^2 + (y_2 - y_1)^2} [/tex]
Let,
[tex] P(2, 6) = (x_1, y_1) [/tex]
[tex] Q(-6, 1) = (x_2, y_2) [/tex]
[tex] PQ = \sqrt{(-6 - 2)^2 + (1 - 6)^2} [/tex]
[tex] PQ = \sqrt{(-8)^2 + (-5)^2} = \sqrt{64 + 25} [/tex]
[tex] PQ = \sqrt{89} = 3.1 [/tex] (to nearest tenth)
b. Coordinate of the midpoint of PQ
[tex] M(\frac{x_1 + x_2}{2}, \frac{y_1 + y_2}{2}) [/tex]
Let [tex] P(2, 6) = (x_1, y_1) [/tex]
[tex] Q(-6, 1) = (x_2, y_2) [/tex]
Thus:
[tex] M(\frac{2 +(-6)}{2}, \frac{6 + 1}{2}) [/tex]
[tex] M(\frac{-4}{2}, \frac{7}{2}) [/tex]
[tex] M(-2, \frac{7}{2}) [/tex]
The coordinates of the midpoint of PQ are (-2,3.5) and this can be determined by using the midpoint formula.
Given :
Coordinates -- P(2,6) and Q(-6,1)
The following steps can be used in order to determine the coordinates of the midpoint of PQ:
Step 1 - According, to the given data, the coordinates of point P(2,6) and Q(-6,1).
Step 2 - The formula of midpoint can be used in order to determine the midpoint of PQ.
Step 3 - The midpoint formula is given below:
[tex]\rm x = \dfrac{x_1+x_2}{2}[/tex]
[tex]\rm y = \dfrac{y_1+y_2}{2}[/tex]
Step 4 - Substitute the values of the coordinates in the above formula.
[tex]\rm x = \dfrac{2-6}{2} = -2[/tex]
[tex]\rm y = \dfrac{6+1}{2}=3.5[/tex]
So, the coordinates of the midpoint of PQ are (-2,3.5).
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Convert 6 1/2 % to a decimal
Answer:
6.5=.065
Step-by-step explanation:
im assuming this is 6.5/100
hope this helps :)
g if cot=-1/3 and sin<0 find each function value only using the appropriate trigonometric identites
Answer:
Step-by-step explanation:
Other trigonometry identities that we have includes cosθ, sinθ, tanθ, secθ, cosecθ
cosecθ = 1/sinθ
Given cotθ=-1/3 and sinθ<0, this means that θ falls in the 4th quadrant.
cotθ= 1/tanθ = -1/3
tanθ = -3/1
Since tanθ = opposite/adjacent = -3/1
opposite = -3
adjacent = 1
Using pythagoras theorem to get the hypotenuse, hyp² = opp²+adj²
hyp² = (-3)²+1²
hyp = √9+1
hyp = √10
cosθ = adjacent/hypotenuse = 1/√10
sinθ = opp/hyp = -3/√10
cosecθ = 1/sinθ = 1/(-3/√10)
cosecθ = -√10/3
secθ = 1/cosθ
secθ = 1/(1/√10)
secθ = 1*√10/1
secθ = √10
The 10,000-meter long-distance running event in the summer Olympics is approximately 6.2 miles. Which equation could be used to determine the time, t, it takes to run 10,000 meters as a function of the average speed, s, of the runner where t is in minutes and s in miles per minute?
The equation that could be used to determine the time, t, it takes to run 10,000 meters as a function of the average speed, s, of the runner where t is in minutes and s in miles per minute is t = 6.2/s miles/minute
What is an average speed?Average speed is defined as the rate of change in distance of a body. Mathematically;
Speed = Distance/TimeGiven the distance of the runner in miles to be;
d = 6.2milesTime taken = tAverage speed = sTo express t in terms of the average speed s and distance of 6.2miles, we will substitute the values into the formula;
s = D/tSubstituting D = 6.2miles into the formula;
s = 6.2/tCross multiply
St = 6.2Divide both sides by 's'
st/s = 6.2/s
t = 6.2/s
Hence, the equation that could be used to determine the time, t, it takes to run 10,000 meters as a function of the average speed, s, of the runner where t is in minutes and s in miles per minute is t = 6.2/s miles/minute
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Solve the following equation using the zero product property (x+9)(4x-1)=0 LAST TRY !!!!!
Answer:
x=-9, x=1/4
Step-by-step explanation:
Split it into x+9=0 and 4x-1=0.
x+9=0; x=-9
4x-1=0; 4x=1; x=1/4