Question

Executives of a supermarket chain are interested in the amount of time that customers spend in the stores during shopping trips. The mean shopping time, , spent by customers at the supermarkets has been reported to be 38 minutes, but executives hire a statistical consultant and ask her to determine whether it can be concluded that his greater than 38 minutes. To perform her statistical test, the consultant collects a random sample of shopping times at the supermarkets. She computes the mean of these times to be 43 minutes and the standard deviation of the times to be 16 minutes. Based on this information, answer the questions below. 00 EO What are the null hypothesis (N.) and the alternative hypothesis (W) that should be used for the test? How NE In the context of this test, what is a Type Il error the hypothesis that is A Type Il erroris when, in fact, is Suppose that the cortant decides not to reject the nut hypothesis. What sort of error mighthebe making X $ Save For Later SA Check

Answer 1

= ومندی ہے S = Answer We have sample mean - X= 43 Il Standard 16 Now we harc to test i Null hypothesis : He l is equal to 38 Alternative hypothesis Hyg ll is is greater than 38 A 1 enroe is Type hypothesis that in fact M Accept Ho u is equal to equal to the 38 when is 43 do aca hypothesis If we Type reject null making I enoe