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Get Full Access to Statistics For Business And Economics - 12 Edition - Chapter 6 - Problem 12e
Get Full Access to Statistics For Business And Economics - 12 Edition - Chapter 6 - Problem 12e

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# Corporate sustainability of CPA firms. Corporate

ISBN: 9780321826237 51

## Solution for problem 12E Chapter 6

Statistics for Business and Economics | 12th Edition

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Problem 12E

Problem 12E

Corporate sustainability of CPA firms. Corporate sustainability refers to business practices designed around social and environmental considerations. Refer to the Business and Society (March 2011) study on the sustainability behaviors of CPA corporations, Exercise 2.23 (p. 59). Recall that the level of support for corporate sustainability (measured on a quantitative scale ranging from 0 to 160 points) was obtained for each in a sample of 992 senior managers at CPA firms. Higher point values indicate a higher level of support for sustainability. The accompanying Minitab printout gives a 90% confidence interval for the mean level of support for all senior managers at CPA firms.

a. Locate the 90% confidence interval on the printout.

b. Use the sample mean and standard deviation on the printout to calculate the 90% confidence interval. Does your result agree with the interval shown on the printout?

c. Give a practical interpretation of the 90% confidence interval.

d. Suppose the CEO of a CPA firm claims that the true mean level of support for sustainability is 75 points. Do you believe this claim Explain.

Step-by-Step Solution:

Solution:

Step 1 of 5:

The summary of the data regarding level of support for corporate sustainability for each seniors managers in CPA firms in a sample of 992 managers is given as

 Variable N Mean St.Dev SE.Mean 90% C.I Support 992 67.755 26.871 0.853 (66.350,69.160)

Using this we need to find the required values.

Step 2 of 5

Step 3 of 5

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