## A major retail clothing store is interested in estimating the difference in mean monthly purchases by customers who use the​ store’s in-hous

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, it has 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. ​In-House Credit Card National Credit Card Sample​ Size: 86 113 Mean Monthly​ Purchases: ​\$45.67 ​\$39.87 Standard​ Deviation: ​\$10.90 ​\$12.47 Suppose that the managers wished to test whether there is a statistical difference in the mean monthly purchases by customers using the two types of credit​ cards, using a significance level of​ 0.05, what is the value of the test statistic assuming the standard deviations are​ known? Round to two decimal places.

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1 month 2021-10-22T09:20:41+00:00 1 Answer 0 views 0