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Oduvanchick [21]
3 years ago
8

The manager of the motor pool wants to know if it costs more to maintain cars that are driven more often. Data are gathered on e

ach car in the motor pool regarding number of miles driven (X) in a given year and maintenance costs for that year (Y) in thousands of dollars. The regression equation is computed as: Y-60+0.08X, and the p-value for the slope estimate is 0.7. What conclusion can we draw from this study? a. Cars that are driven more tend to cost more to maintain. b. There's no statistically significant linear relationship between the number of miles driven and the maintenance cost c. The correlation between the response variable and independent variable is significant. d. The slope estimate is significantly different from zero.
Mathematics
1 answer:
Liula [17]3 years ago
5 0

Answer:

b. There's no statistically significant linear relationship between the number of miles driven and the maintenance cost

Step-by-step explanation:

The p-value for the slope estimate show us how strong is the certainty that there are a linear relationship between both variables. In this case, the p-value for the slopes shows if there is a significant relationship between the number of miles driven and the maintenance cost.

If we have a high p-value like 0.7 we can said that there is no certainty in the linear relationship. it means that there's no statistically significant linear relationship between the number of miles driven and the maintenance cost.

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Answer:

1.

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5 0
3 years ago
Solve for X. 20 points !!!!
GarryVolchara [31]

Answer:

4) x = - 12

5) x = 4

Step-by-step explanation:

4)

Since points T and S are mid points of sides ML and MN of triangle MLN.

Therefore, by mid point theorem,

TS is half of LN

so,

x + 26 =  \frac{1}{2} (x + 40) \\  \\ 2(x + 26) =x + 40 \\  \\ 2x + 52 = x + 40 \\  \\ 2x - x = 40 - 52 \\  \\ x =  - 12

5) In the same way x = 4 will be the correct answer in question number 5.

3 0
3 years ago
Almost all companies utilize some type of year-end performance review for their employees. Human Resource (HR) at a university's
balu736 [363]

Answer:

The Answer is 76.

Step-by-step explanation:

Given the normal distribution " 10% of employees (rated) exemplary, 20% distinguished, 40% competent, 20% marginal, and 10% unacceptable'',  we can see that exemplary employees are top 10% rated employees.

We have the formula for normal distribution:

z=(X-M)÷σ

where z is the <em>minimum z-score </em>for top 10% employee, X is the <em>minimum </em>score for top 10% employee, M is the <em>mean</em> of the score distribution, σ is the <em>standard deviation</em> of the score distribution.

The z-score we are looking for is the value "a" that separates the highest 10% from the lowest 90% i.e. P(z≤a)=0.90

If we look at z-table, corresponding value for a is 1.28155

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Therefore minimum score for exemplary employee is 76.

3 0
3 years ago
15 bakers complete a big order in 24 hours. How many hours would it take 18 bakers to complete the same order?
MissTica

This is right!!!

Question asker, by any chance do you go to RSM?

7 0
3 years ago
Read 2 more answers
Find cot theta if csc theta= the square root of 5/2 and tan theta&gt;0
Nostrana [21]
Since \cot^2\theta+1=\csc^2\theta, you have

\cot^2\theta=\left(\dfrac{\sqrt5}2\right)^2-1=\dfrac14
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Since \tan\theta>0, and \cot\theta=\dfrac1{\tan\theta}, you know that \cot\theta is also positive, which means

\cot\theta=\dfrac12
3 0
3 years ago
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