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Mathematics, 18.06.2020 03:57 joeylozier15

Atm machines must be stocked with enough cash to satisfy customers making withdrawals over an entire weekend. however if too much cash is kept i ATMs, the bank is forgoing the opportunities of investing the money to earn interest. Suppose that at a particular branch the expected mean amount of money withdrawn from ATMs per customer over weekend is $160 and population standard deviation of $30. If a random sample of 36 customers is examined and the sample mean withdrawal is $172, is there enough evidence to believe that average withdrawal is more than $160. Use the significance level of 0.05 to perform your test. Remember to perform all the steps.

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