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What is the probability that the sample mean

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Reference no: EM132483170

A bank has kept records of the checking balances of its customers and determined that the average daily balance of its customers is $300 with a standard deviation of $48. A random sample of 144 checking accounts is selected.

a. What is the probability that the sample mean will be between $302 and $308?

b. What is the probability that the sample mean will be more than $305?

c. There are 80% chances that the sample mean will be between which two value symmetrically distributed about the population mean?

Reference no: EM132483170

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