Question

In this problem, assume that the distribution of differences is approximately normal. Note: For degrees of freedom d.f. not in the Student's t table, use the closest d.f. that is smaller. In some situations, this choice of d.f. may increase the P-value by a small amount and therefore produce a slightly more "conservative" answer. Are America's top chief executive officers (CEOs) really worth all that money? One way to answer this question is to look at row B, the annual company percentage increase in revenue, versus row A, the CEO's annual percentage salary increase in that same company. Suppose a random sample of companies yielded the following data: B: Percent increase for company 24 23 27 18 6 4 21 37 A: Percent increase for CEO 21 25 22 14 −4 19 15 30 Do these data indicate that the population mean percentage increase in corporate revenue (row B) is different from the population mean percentage increase in CEO salary? Use a 5% level of significance. (Let d = B − A.) What is the value of the sample test statistic? (Round your answer to three decimal places.)

          In this problem, assume that the distribution of differences is
approximately normal. Note: For degrees of
freedom d.f. not in the
Student's t table, use the
closest d.f. that is smaller.
In some situations, this choice of d.f. may
increase the P-value by a small amount and therefore
produce a slightly more "conservative" answer.
Are America's top chief executive officers (CEOs) really worth
all that money? One way to answer this question is to look at
row B, the annual company percentage increase in
revenue, versus row A, the CEO's annual percentage
salary increase in that same company. Suppose a random sample of
companies yielded the following data:
B: Percent increase
for company
24
23
27
18
6
4
21
37
A: Percent increase
for CEO
21
25
22
14
−4
19
15
30
Do these data indicate that the population mean percentage
increase in corporate revenue (row B) is different
from the population mean percentage increase in CEO salary? Use a
5% level of significance.
(Let d = B − A.)
What is the value of the sample test statistic? (Round your
answer to three decimal places.)

Added by Michele H.

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