# Question

Whole Foods is an all- natural grocery chain that has 50,000 square foot stores, up from the industry average of 34,000 square feet. Sales per square foot of supermarkets average just under $ 400 per square foot, as reported by USA Today in an article on “A whole new ballgame in grocery shopping.” Suppose that sales per square foot in the most recent fiscal year are recorded for a random sample of 10 Whole Foods supermarkets. The data (sales dollars per square foot) are as follows: 854, 858, 801, 892, 849, 807, 894, 863, 829, 815. Using the facts that the sample mean and sample standard deviation are 846.2 and 32.866, respectively,

(1) Find a 95 percent confidence interval for the population mean sales dollars per square foot for all Whole Foods supermarkets during the most recent fiscal year. Assume normality.

(2) Are we 95 percent confident that this population mean is greater than $ 800, the historical average for Whole Foods?

(1) Find a 95 percent confidence interval for the population mean sales dollars per square foot for all Whole Foods supermarkets during the most recent fiscal year. Assume normality.

(2) Are we 95 percent confident that this population mean is greater than $ 800, the historical average for Whole Foods?

## Answer to relevant Questions

A production supervisor at a major chemical company wishes to determine whether a new catalyst, catalyst XA-100, increases the mean hourly yield of a chemical process beyond the current mean hourly yield, which is known to ...Explain exactly what we mean when we say that a sample of size n makes us 99 percent confident that x̅ is within E units of μ. Referring to Exercise 8.19, regard the sample of 15 alert times (which has standard deviation 1.026) as a preliminary sample. Determine the sample size needed to make us 95 percent confident that x-bar, the sample mean alert ...Consider the marketing ethics case described in Example 8.8. One of the scenarios presented to the 205 marketing researchers is as follows: A marketing testing firm to which X company gives most of its business recently ...A company’s manager is considering simplification of a travel voucher form. In order to assess the costs associated with erroneous travel vouchers, the manager must estimate the total number of such vouchers that were ...Post your question

0