A major retail clothing store is interested in estimating the difference in mean

Question

A major retail clothing store is interested in estimating the difference in mean monthly purchases by customers who use the store's in-house credit card versus using a Visa, MasterCard, or one of the other major credit cards. To do this they have randomly selected a sample of customers who have made one or more purchases with each of the types of credit cards. The following represents the results of the sampling. Which of the following statements is correct? The 95% confidence interval estimate of the difference in mean monthly purchases (exist2, 55, 5905) supports a conclusion that customers who use the store's in-house Credit card spend more than customers The 95% confidence interval estimate of the difference in mean monthly purchases (exist2, 55, 5905) supports a conclusion that there is no difference in the mean amount spent by the customers who use the store's in-house Credit card compared to customers using a major national credit card The 95% confidence interval estimate of the difference in mean monthly purchases (exist2, 55, 5905) supports a conclusion that customers using a major national credit card spend more than customers who use the store's in-house credit card None of the above are true

Explanation / Answer

Option(C).....................

Because interval contains positive no.

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