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Markie Morris 1. IA Credit Card Company wants to evaluate the usage of their card. They randomly selected 16 credit card holders and found that the mean amount they charged in the past twelve months was $2017, while the standard deviation was $867. Use a 0.025 significance level to evaluate the claim that the mean amount charged by all credit card holders was greater than $1750. A. State the null and alternate hypotheses. B. State the decision rule. C. Compute the value of the test statistic. D. What is your decision regarding the null hypotheses? 2. A retail management trade journal reported that the typical shopper spends an average of 1.80 hours per visit in shopping mall. A sample of 8 shoppers at the Byrnswick Mall in south Toledo revealed the following times. At the 0.01 significance level, can we conclude that shoppers at the Byrnwick Mall spend less than a mean of 1.80 hours? 1.6 1.5 1.6 2.1 1.5 1.9 1.8 2.0 A. State the null and alternate hypotheses. B. State the decision rule. C. Compute the value of the test statistic.
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