Charles asked his teammates how many hours they practiced swimming during the week. He recorded his data in the table below and used the shaded columns to calculate three sample means. What is the range of the values for the sample means?
Hours of Swim Practice
4
5
3
6
3
8
3
5
4
7
6
2
4
5
3
5
2
3
4
6
1
2
3.75
4.75
Answers
Answer: B
Step-by-step explanation:
took test :)
Answer:
The answer is B
Step-by-step explanation:
2
Related Questions
Jalaysha is three years less than twice as old as Ben, and Maureen is two years older than Ben. Write an expression for Jalaysa and Maureen's ages in terms of Ben'sunknown age, b.
Write in simplest Standard Form
jalaysha age:
Maureen's age:
Answers
Answer:
3 - 2 x b
For jalaysha's age.
b + 2
Is maureen's age
Answer:
3-2*b=j
2+b=m
Step-by-step explanation:
Hi 2+2=? Lllalalalala aplalalaalallala Latakia,Lana,
Answers
Answer:
2+2= 4
Step-by-step explanation:
QUICK MATHS
paulette has arrived at cape horn. there are five penguins waiting to cross over to antarctica. jim goes before john but after joe. jim returns, fetches his wallet and follows the others. in which order will the penguins arrive?
Answers
Well, this is a guess. Jim goes before john, but after joe. So Jim is second. John is third, so that leaved Joe.
Joe, Jim, John. But I don't know about the other 2.
---
sorry if this doesn't help
Help plz tyyy.... hurry!
Answers
Answer:
0%
Step-by-step explanation:
im not sure but i got the answer because the square was not have any color
I need help if you can help me I would really appreciate it
Answers
Answer:
A. f(x) = −2|x| + 1
Step-by-step explanation:
PLEASE HELP ME ITS WORTH 25 pts (question number 29)
Answers
Answer:
A, C, D
Step-by-step explanation:
In a proportional relationship, y = kx, k is the constant of proportionality.
A)
4y = x
y = 1/4 x
k = 1/4 Yes
B)
y = 4x
k = 4 No
C)
32y = 8x
y = 8/32 x
y = 1/4 x
k = 1/4 Yes
D)
y = 0.25x
k = 0.25 = 1/4 Yes
E)
1/4 y = 2x
y = 4 * 2x
y = 8x
k = 8 No
Answer: A, C, D
Select all the properties of a right triangle.
Group of answer choices
Has a right angle
Has one obtuse angle
Has perpendicular lines
Has three acute angles
Answers
Answer:
aaaaa
Step-by-step expaalanation:
aa
Answer:
It should be answers one and three
12 students have blue eyes. if there are 25 students in the class, what percent of students have blue eyes
Answers
Answer:
3
Step-by-step explanation:
First, you need to turn 12 into 0.12. Then, you multiply that by 25 and boom you get 3.
This is the same every time.
For example, what percent is 28 of 49?
0.28*49=13.72.
Out of 25 students 48% students have blue eyes.
What is percentage?Percentage is the relative value indicating one hundredth part of any quantity.Percentage is denoted by (%).How to find what percent of students have blue eyes?According to the question,
Total number of students in the class = 25Total number of students having blue eyes = 12Now, we can calculate the percentage by the formula, [tex](\frac{number}{total})[/tex] x 100 %
∴ percentage of students have blue eyes [tex](\frac{12}{25})[/tex] x 100 % = 48 %
∴ percentage of students have blue eyes are 48 %
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What is x?
x/8 + 6 = 4
x=_?
Answers
Answer:x=-16
Step-by-step explanation:
Subtract 6 from both sides
x/8=-2
Multiply the number by 8 on both sides to get x by itself
x=-16
Hope you are having a good day and if you could, brainliest would be nice
to get x alone you have to subtract 6 on both sides giving you x/8=-2 then you multiply 8 on both sides giving you x=-16
What is the area of this circle?
Answers
Answer:
area = 28.26 in²
Step-by-step explanation:
area = 3²(π) = 9(3.14) = 28.26 in²
Answer:
28.27 in^2
Step-by-step explanation:
Area of a circle = pi*r^2
pi*9=28.27
look at the picture I attached
Answers
Answer:
6
im not really sure how to explain this, using the number line go from -2 to 4, getting you to 6 spaces
What is the Genotypic and Phenotypic ratio?
Answers
Answer:
The phenotypic ratios are the ratios of visible characteristics. The genotypic ratios are the ratios of gene combinations in the offspring, and these are not always distinguishable in the phenotypes.
Genotype is the genetic make-up of an organism that describes the nature of each trait. (the letters we often write for a certain trait)
What is the Genotypic and Phenotypic ratio?Genotype is the genetic make-up of an organism that describes the nature of each trait. (the letters we often write for a certain trait)
Phenotype is the morphology of a living organism .(the trait you usually observe while looking/tracking the organism)
For an Example:
In the flower of a pea plant there are a pink color(RR) or (Rr) and a white color(rr).
When crossing two hybrid ( with two different letters) pink colors,
P : Rr × Rr
G : R r R r
F1 : RR Rr Rr rr
The phenotype ratio will be (3 pink : 1 white)
The genotype ratio will be [1 (RR) : 2 (Rr) : 1 (rr)]..
Hence Genotype is the genetic make-up of an organism that describes the nature of each trait. (the letters we often write for a certain trait)
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What is the point slope form of the line with slope 2/5 that passes through the point (-4, -7)?
y+7=2/5(x+4)
y-7=2/5(x-4)
y-4=2/5(x-7)
y+4=2/5(x+7)
Answers
Answer:
A. y + 7 = 2/5(x + 4)
Step-by-step explanation:
gradient (m) = 2/5(x1, y1) → (-4, - 7)x1 = -4y1 = -7so,
[tex] \rm y - y1 = m(x - x1)[/tex]
[tex] \rm y - ( - 7) = \frac{2}{5} (x - ( - 4))[/tex]
[tex] \boxed{ \rm y + 7 = \frac{2}{5} (x + 4)}[/tex]
suppose a graph shows that Jenny started with $3 and saved $2 each day. What would point (5,13) represent?
Answers
Answer:
5 is the amount of days shes been saving for
13 would be the total money she has now
Step-by-step explanation:
Days / Money saved
0 / 3
1 / 5
2 / 7
3 / 9
4 / 11
5 / 13
A basketball player made 16 shots for a total of 38 points during a game. Some points were worth 2 points and some were worth 3 points. Write a system of equations that models this. How many 2 and 3 point shots did he make? Write your answer as a coordinate.
Answers
Answer:
4- 3s and 2- 2s
Step-by-step explanation:
3+3+2+2+3+3
The table shows the number of blue marbles and red marbles that four friends have collected,
Blue and Red Marbles
Blue Red
Jasmine 12
10
Aaron
3
2
Lucian
10
10
Gretchen 14
2
Which person has the lowest ratio of blue to red marbles?
Jasmine
Aaron
Lucian
Gretchen
Answers
Answer:
C
Step-by-step explanation:
Please help I have no clue lol
Answers
Answer:
x=12
y=44
z=25
Step-by-step explanation:
Since it's an equilateral triangle, all 3 angles have to equal 60.
5x=60
x=12
y+16=60
y=44
3z-15=60
3z=75
z=25
Q1a. A bag contains 8 red, 10 pink, 6 purple, 5 green, and 11 blue jolly
ranchers. What is the probability of selecting a green jolly rancher,
P(green)?
Answers
Answer:p=8
Step-by-step explanation:
Add them all and divide by 5.
Students in a statistics class are conducting a survey to estimate the mean number of units students at their college are enrolled in. The students collect a random sample of 45 students. The mean of the sample is 12.1 units. The sample has a standard deviation of 1.5 units. What is the 95% confidence interval for the average number of units that students in their college are enrolled in
Answers
The 95% confidence interval for the average number of units that students in their college are enrolled in is approximately 11.66 to 12.54 units. This means that we are 95% confident that the true population mean lies within this interval.
Here,
To calculate the 95% confidence interval for the average number of units that students in their college are enrolled in, we can use the formula for a confidence interval for a population mean when the population standard deviation is unknown but can be estimated using the sample standard deviation.
The formula for the confidence interval is given by:
Confidence Interval = Sample Mean ± (Critical Value) * (Standard Error)
where:
Sample Mean (x) is the mean of the sample (12.1 units in this case).
Critical Value is the value from the t-distribution corresponding to the desired confidence level and the sample size.
For a 95% confidence level and a sample size of 45, the critical value is approximately 2.013 (you can look this up in a t-table or use a calculator).
Standard Error is the standard deviation of the sample mean, which is calculated as the sample standard deviation divided by the square root of the sample size.
Given the information in the problem:
Sample Mean (x) = 12.1 units
Sample Standard Deviation (s) = 1.5 units
Sample Size (n) = 45
Confidence Level = 95%
Critical Value ≈ 2.013
Now, let's calculate the standard error:
Standard Error = s / √n
Standard Error = 1.5 / √45 ≈ 0.2236
Now, calculate the confidence interval:
Lower bound of the confidence interval:
12.1 - (2.013 * 0.2236) ≈ 11.66
Upper bound of the confidence interval:
12.1 + (2.013 * 0.2236) ≈ 12.54
So, the 95% confidence interval for the average number of units that students in their college are enrolled in is approximately 11.66 to 12.54 units. This means that we are 95% confident that the true population mean lies within this interval.
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X=8
THE DIRECTIONS ARE ON THE TOP
Answers
Answer:
y = 40
Step-by-step explanation:
For #7, we are told that y = 10 when x = 2
We are also told that 'y varies directly as x'. That means there is some constant number, k, so that
Formula --> y = kx
Since y=10 and x= 2, we substitute those numbers into the formula.
We get 10 = k × 2.
So k has to be 5, right?
k = 5
So what is y when x = 8?
Use the formula.
y=kx ---> That gives us y = k × 8. But we know k is 5.
So y = 5 × 8 = 40
y = 40
9514 1404 393
Answer:
7. y = 5x; y = 40
8. y = 1/3x; y = 8/3
Step-by-step explanation:
In the direct proportion equation y=kx, the value of k can be found as ...
k = y/x . . . . . divide both sides by x to solve for k
__
7. k = 10/2 = 5
The equation is ...
y = 5x
For x=8, the value of y is found using the equation:
y = 5(8) = 40
__
8. Same deal, different numbers.
k = 6/18 = 1/3
y = 1/3x . . . . . the equation
y = 8/3 . . . . . y for x=8
7)
Which could be solved for x?
-0)
A)
2x+2
B)
3(x+ 2)
)
D)
1 / 8x = 12
Answers
Which of the following is equivalent to the expression below?
4x + 3(2x - 1) - 4x
Answers
What is the sum of the interior angles of the polygon below?
A polygon with 5 sides.
°
Answers
Answer:
just draw a diagonal of the figure and you note it turns into two triangles.
hence sum = 2 × 180= 360 degree
O
.
Suppose that you want to save money and would like to find a savings option that earns you the most
money in interest. You have $1000 to put towards savings. After surveying several banks for savings
plans, you found these options. "A" represents the amount you will have in the bank after x years.
Option A: Your money would receive simple interest at the end of 5 years.
The formula is: A = 1000 + 1000(0.05)x
Option B: Your money will be compounded continuously.
The formula is: A = 1000(2.71828)(0.05x)
Option C: You will invest in a CD (Certificate of Deposit) compounded yearly.
o The formula is: A = 1000(1.05)*
Option D: You buy a US Savings Bond.
The savings bond costs $1000 now. When cashed in 5 years later, the amount will be
$1267. You must leave the money in the savings bond for 5 years to earn any interest.
But, you do not receive any additional interest if you leave it in longer than 5 years.
O
1. Each option represents a function. State the type of function (linear, exponential, or "other")
described by each of the options. Explain your answers. (2 points)
2. Determine the value of each option at the end of 5 years. (2 points each; 8 points total)
Option A
Option B
Option
Option D
Answers
CAMO is a rectangle with diagonals intersecting at W. WA = 4x - 3 , CW = x + 6 , and AO = 22 Find x.
Answers
Answer:
x = 3.5
Step-by-step explanation:
diagonals bisect each other so AW = OW
since AO = 22 then AW = 11
11 = 4x - 3
14 = 4x
x = 7/2 or 3 1/2
Can anyone solo be this?
Answers
Answer:
x = 10
Step-by-step explanation:
Angles 12x and 10x + 20 are "vertical angles," meaning that they are identical (same value). Therefore we can write the equation 12x = 10x + 20, which reduces to 2x = 20, or x = 10.
Answer:
x=10
Step-by-step explanation:
Hey There!
Those are a pair of vertical angles
Therefore they are congruent
congruent meaning identical in form
So we would setup and equation and because the angles are congruent the equation would be
12x=10x+20 and solve for x
Step 1 subtract 10x from each side
10x-10x cancels out
12x-10x=2x
now we have
2x=20
Step 2 divide each side by 2
2/2 cancels out
20/2=10
Therefore x=10
A private plane traveled from Seattle to a rugged wilderness, at an average speed of 132 mph. On the return trip, the average speed was 110 mph. If the total traveling time was 6 hours, how far is Seattle from the wilderness?
Answers
Answer:
Brainliest PLEASE!
Step-by-step explanation:
a = seattle
b = wilderness
t = time traveling at 132 mph
(4-t) = time traveling at 110 mph
distance traveled at 132 mph = 132(t)
distance traveled at 110 mph = 110(4-t)
but the two distances are equal so:
132t = 110(4-t), solving for t
t = 1.82 hrs
d= 1.82 hrs * 132 m/hr = 240 miles
What are the x 2x + 4 = x + 18
Answers
Step-by-step explanation:
2x+4=x+18
2x-x=18-4( Addition on the Right hand side changes to subtraction on the left hand side and wise-versa.)
1x=14
1x(1*x so X itself)
X=14
Answer:
x+2x+4_x_18=0
2x_14=0
x=14÷2
x=7
PLS HELP WILL MARK BRAINLIEST
Answers
Answer:
Complementary Angles
Step-by-step explanation:
When all angles are added together they have a sum of 90°. Two angles that have a sum of 90° are complementary angles.
I know this is 90° because it is a right angle.
An inspector inspects a shipment of medications to determine the efficacy in terms of the proportion p in the shipment that failed to retain full potency after 60 days of production. Unless there is clear evidence that this proportion is less than 0.05, she will reject the shipment. To reach a decision, she will test the following a large-sample. To do so, she selects an SRS of 200 pills. Suppose that eight of the pills have failed to retain their full potency. The best point estimate for a 95% confidence interval for the true proportion of pills in the shipment that have failed to retain full potency is ___. Round your answer to three decimal places.
Answers
Answer:
The sample proportion is p = 0.04.
Step-by-step explanation:
The best point estimate for a 95% confidence interval for the true proportion of pills in the shipment that have failed to retain full potency is ...
Sample of 200 pills.
Eight have failed to retain their full potency.
So the sample proportion is:
[tex]p = \frac{8}{200} = 0.04[/tex]