chapter 12 assignment

Assignment: #17 (pg. 287) and case Pets questions 2, 5, 6 (pg. 288)

17. It is reported in the newspaper that a survey sponsored by Forbes magazine with 200 Fortune 500 company top executives has found that 75% believe that the United States trails Japan and Germany in automobile engineering. What percent of all Fortune 500 company top executives believe that the United States trails Japan and Germany?

This question requires application of the formula for a confidence interval for a percent.

Write a conclusion statement like this: Based off of our sample of 200 executives, we are 95% confident that the total percent of all Fortune 500 companies belief that the US trails Japan and Germany will fall between ____% and _____%”

2. How much did they typically spend on the last visit?

The mean () is $18.20 in this example, n = 162

Write a conclusion statement

5. What percent has recommended Pets, Pets, & Pets to friends?

The p is 82.1 in this example, n = 162

Write a conclusion statement

6. The manager at Pets, Pets, & Pets believes that, on average, store customers own two pets. Is this belief supported by the survey?

COMPARE THE CALCULATED Z TO 1.96 FOR COMPARISON.

· If z is GREATER THAN 1.96, then the hypothesis is NOT supported.

NEED FINAL CONCLUSION