Question: The policy of particular bank branch is that its ATM must be stocked wit enough cash to satisfy customers making withdrawals over an entire weekend. Customer goodwill depends on such services meeting customer needs. At the branch the expected mean amount of money withdrawn from ATMs per customer transaction over the weekend is $160 with a population standard deviation pf $ 30. Suppose that a random sample of 36 customers transactions examined and it is observed that the sample mean withdrawn is $172.

1. At 10% level of significance, using the critical value approach to hypothesis testing, is there evidence to believe that the true mean withdrawl is no longer $160?
2. set up a 95% confidence interval estimate for the true amount of cash withdrawal per customer from ATMs over the weekend. Does it provide sufficient evidence to claim that the true mean withdrawal is $160?

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Deliverable: Word Document