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A credit bereau analysis of undergraduates students found that the average number of credit cards in an undergraduates wallet is 4.09. A researcher thought the actual total may be higher and surveyed 132 students at random and the results showed a sample mean of 5.1 cards with a sample standard veviation of 1.2. Is there convinving evidence at the .05 significance level to support the claim that the actual number of cards is an undergrads wallet is greater than 4.09.

a) state the null and alternative hypothesis
b)whcih formula do you use
c)calculate the test statistic
D)state the critical value
e)state your conclusion.

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Statistics and Probability, Statistics

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