Since the Boston marathon began in 1897, the finish time has been incrementally decreasing. The mean finish time to date is 231 minutes with a standard deviation of 40 minutes. Based on this information, what would allow us to use a Z-score in order to construct a confidence interval to estimate the mean finishing time of the most recent Boston Marathon with a sample size of 40 participants. Choose all that apply.

Answers

Answer 1

Answer:

hello your question lacks the required options but i will provide a general answer to your question

answer : The mean value  and the standard deviation would allow us use a Z-score

Step-by-step explanation:

mean value = 231 minutes

standard deviation ( std ) = 40 minutes

sample size = 40

The parameters that would be applicable while use Z-score are : The given mean value and the standard deviation

This is because the value of a z-score gives us an information on how far we are from the mean score i.e. number of standard deviations

+Zscore means that the score  is above the average value

-Zscore means that the score is below the average value


Related Questions

PLS HELP I DONT UNDERSTAND :( WILL GIVE BRAINLIEST + 25 POINTS!!

Answers

Answer:

it is f

Step-by-step explanation:

There are 5 students in Mrs. Templeton's art class. Each student has 2 paintbrushes on his desk. Which of the following shows how to find the total number of paintbrushes in the classroom?

Answers

You would have 5 students and you would give them 2 paint brushes each and that would give you 10 because 5x2=10


Based on the P's and Q's of this polynomial (The Rational Zero Theorem), which of the following could NOT be a zero of the polynomial 4x3 + 4x2 - 11x-6?

Answers

Answer:

4

Step-by-step explanation:

P are the factors of the last coefficient (6) and Q are the factors of the first coefficient (4). Since p is divided by q, we could have 3/1, 6/1, 2/1, and 1/1, but not 4/1 since 4 is not a factor of 6

As a computer technician, Andre makes $20 per hour to diagnose a problem and $25 per hour to fix a problem. He works fewer than 10 hours per week, but wants to make at least $200 per week. The inequalities 20x + 25y ≥ 200 and
x + y < 10 represent the situation. Which is true of the graph of the solution set? Check all that apply.

Answers

Answer:the line x+y<10 has a negative slope and a positive y intercept

The line representing 20x+25y>200 is solid and the graph is shaded above line

The overlapping region contains the point (4,5)

Step-by-step explanation:

;)

Answer:

The answers are B, C, and E.

Step-by-step explanation:

I got it right on edge

Based on a large national sample of working adults, the U.S. Census Bureau reports the following information on travel time to work for those who do not work at home. Also given was the mean travel time, which was reported as 23.4 min.
Lower quartile 7 min
Median 18 min
Upper quartile 29 min
What is true of the travel time distribution?
A. It is positively skewed
B. It is approximately symmetric
C. It is negatively skewed

Answers

Answer:

Step-by-step explanation:

H3Y TH3R3 D1L1GH74 WH4T5 1T 71K3 1N NYC 1M 4 TH0US4-

Express -17/8 in decimal form

Answers

Answer:

Its -2.125

Step-by-step explanation:

I hope helps!

Which of the following slopes of a line passes through points (2, 3) and (4,7) ?
5
2
3
O

Answers

Answer:

2

Step-by-step explanation:

slope = (difference in y)/(difference in x)

slope = (7 - 3)/(4 - 2)

slope = 4/2 = 2

Answer: 2

Perform the indicated operation and simplify the result, Leave your answer in factored form.
[tex]\frac{x^{2} }{5x-8} -\frac{64}{5x-8}[/tex]

Answers

Answer:

[tex]\frac{x^{2} }{5x-8}-\frac{64}{5x-8}=\frac{x^{2}-64 }{5x-8}=\frac{(x-8)(x+8)}{5x-8}[/tex]

Step-by-step explanation:

Last night, the Knicks made 12 free throws. If their free throw percentage is 75%, how many free throws were attempted? (READ CAREFULLY!)

Answers

16 free throws were attempted

Answer:

16

Step-by-step explanation:

12 / 16 = 0. 75

i found this by dividing 12 by 0.75

evaluate each expression |-16| - |4|

Answers

The answer would be 12 as the absolute value makes it positive for the inside number and then 16-4 is 12

1) What is the constant of proportionality that relates y to x
х
Y
8
6
20
15
28
21
a. 1.33
6,48
0.0.75
b. 14
f

Answers

Answer:  The Answer Is A Because if u just add the numbers then divide them

Somebody knows how to this?

Answers

I think the value of x is 8

Two angles are complementary. The measure of the larger angle is LaTeX: 30^\circ30 ∘more than 4 times the measure of the smaller. Find the measure of both angles.

Answers

BI This year sucks and all but it wouldn’t be that bad if everyone just made themselves some bear shaped pancakes

Answer assp ill give points or brainly

Answers

Hi I hope you have an amazing day

Answer:

yo

Step-by-step explanation:

why need answer "assp"

How do you write 7.3 x 10-1 in standard form?

Answers

000074 .. hope that helps :)

What is the greatest common factor for 12 and 54? enter your answer in the box.

Answers

Answer:

6

Step-by-step explanation:

Factors for 12: 1, 2, 3, 4, 6, 12

Factors for 54: 1, 2, 3, 6, 9, 18, 27, 54

It's 6.

The greatest common factor of the numbers 12 and 54 will be 6.

Given that:

Numbers, 12 and 54

The biggest chunk of the common factors is called the "Greatest Common Factor" (of two or more numbers).

The factors of the numbers 12 and 54 are calculated as,

12 = 2² x 3

54 = 2 x 3³

The value of the greatest common factor is calculated as,

GCF = 2 x 3

GCF = 6

More about the greatest common factor link is given below.

https://brainly.com/question/11221202

#SPJ6

Help Pleasee, Thank You!

Answers

Answer:

A. 354.20 + 50.60w ≥ 1,099.51

Step-by-step explanation:

$354.20 (her savings)

$50.60 (what she can save every week)

she need to get to a total of (at least) $1,099.51

354.20 (she already have) + 50.60 per week it need to be equal or more than 1,099.51

354.20 + 50.60w ≥ 1,099.51

Please help me with this homework

Answers

Answer:

4, 2, 0, -2

Step-by-step explanation:

just plug the x value into y=-2x

PLS HELP GUYS!!!
Select the correct step to solve 10x = 150.


Divide only one side of the equation by 150.

Divide both sides of the equation by 10.

Divide both sides of the equation by 150.

Divide only one side of the equation by 10.

Answers

Answer:

divide both sides of the equation by 10

divide both sides by 10 or just divide 150 by 10

plz help! will give brainliest!!!

Answers

Answer:

c

Step-by-step explanation:

Do anybody know geometry?

Answers

Answer:

D. 29

Step-by-step explanation:

180 - 151 = 29


Peter and Judy together earn $5060 per month. Their mortgage payment is $1265
pr month. What percentage of their household income goes toward paying the
mortgage?

Answers

Answer:

25 percent

Step-by-step explanation:

John picked 340 oranges. If he had 17 buckets to carry the oranges in, how many oranges would be in each bucket?

Answers

Answer: There would be 20 oranges in each bucket

Step-by-step explanation:

Answer:

20 oranges

Step-by-step explanation:

if john has to distribute the 340 oranges he picked amongst 17 buckets, the equation that represents his situation would be 340/17. just divide and you'll get 20, meaning there's 20 oranges in each bucket.

Order these numbers from least to greatest.

Answers

Answer: -6 2/3, square root of 36, 6.4..., 71/11

Step-by-step explanation:

Turn the fractions into decimals for more understanding and solve for the square root of 36, 6.4... stays the same

Hay it is meh plz save me

Answers

Answer:

The distance is 1/3 :)

Your welcome

Answer:

1/3

Step-by-step explanation:

Hope it helps :)

Which graph shows the following system of equations and its solutions? -0.1x-0.3y=1.2 and 0.2x-0.5y=2

Answers

Answer:

Option b is the correct answer as both the equations are true for given solution.

Step-by-step explanation:

Given equations are:

-0.1x-0.3y=1.2

0.2x-0.5y=2

We can observe each graph and find the point that is the solution and put the point in the equations to know if that point is the solution

For option A:

(0,4)

Putting x=0 and y = 4 in both equations

[tex]-0.1(0)-0.3(4)=1.2\\0-1.2 =1.2\\-1.2 \neq 1.2\\0.2(0)-0.5(4)=2\\0-2 = 2\\-2 \neq 2[/tex]

This is not the correct answer as both equations are not true with this solution

For Option B:

(0,-4)

Putting x = 0 and y = -4 in both equations

[tex]-0.1(0)-0.3(-4)=1.2\\0+1.2 = 1.2\\1.2 = 1.2\\0.2x-0.5y=2\\0.2(0)-0.5(-4) = 2\\2 = 2[/tex]

Both equations are true for (0,-4) hence it is the solution of the system.

For Option C:

(4,0)

[tex]-0.1(4)-0.3(0)=1.2\\-0.4-0 = 1.2\\-0.4 \neq 1.2\\0.2x-0.5y=2\\0.2(4)-0.5(0) = 2\\0.8 \neq 2[/tex]

Not true for both equations

Hence,

Option b is the correct answer.

Write a function formula for g using the function f.
g(x)=

Write a function formula for f using the function g.
f(x)=


Answers

Answer:

g(x) = -f(x+3)

f(x) = -g(x-3)

Step-by-step explanation:

Transformations

Function f can be obtained by knowing function g and vice-versa.

Suppose we know the expression of function f. If we reflect f across the x-axis, we get function g but displaced 3 units to the right.

Thus, we only have to translate the reflected f 3 units to the left:

g(x) = -f(x+3)

Similarly, if g(x) is reflected across the x-axis and translated by 3 units to the right, we get f(x), thus:

f(x) = -g(x-3)

Given the side lengths of 20,23 and 41, determine whether the triangle is acute, right, obtuse, or not a triangle.

Answers

Answer:  Obtuse triangle

=====================================================

Explanation:

In this case, a triangle is possible since adding any two sides leads to a sum larger than the third side

20+23 = 43 is larger than 4120+41 = 61 is larger than 2323+41 = 64 is larger than 20

I'm using the triangle inequality theorem here.

----------------------------

To determine what kind of triangle we have, we'll use the converse of the Pythagorean theorem. Specifically, we'll use a corollary of it.

Consider a triangle with sides a,b,c. Let c be the longest side.

We have three possible cases:

If a^2+b^2 = c^2, then we have a right triangleIf a^2+b^2 > c^2, then the triangle is acute.If a^2+b^2 < c^2, then the triangle is obtuse.

For this problem, we have a = 20, b = 23, c = 41.

We see that a^2+b^2 = 20^2+23^2 = 929 and c^2 = 41^2 = 1681.

In short, a^2+b^2 = 929 and c^2 = 1681.

Since 929 < 1681, this means a^2+b^2 < c^2.

Therefore, this triangle is obtuse.

Find does angles
Help pls I have 15 min only .

Answers

Answer:

22 for x 45 for 4x+3 36 for 3x+2

Step-by-step explanation:

Trust me this is easy

Answer:

4x+2 =90°

3x+2=68°

x=22

Step-by-step explanation:

The interior angles of a triangle always add up to 180° so you will add the angles together and set them equal to 180° to solve for x. You will find that x should be equal to 22. Plug 22 into each equation to find the angle measure.

Jon invests $4,100 into an account that pays 5 percent simple interest each year. What is the total balance in the account after 3 years?

Answers

Answer:

615

Step-by-step explanation:

4100*3 then you have to multiply by the rate in decimal form which is 0.05!

Answer:

a.

Step-by-step explanation: if i’m wrong lmk

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