Probability that simple random sample automobile insurance

Reference no: EM13103593

The mean annual cost of automobile insurance is $939. Assume that the standard deviation a= $245.

a) What is the probability that a simple random sample of automobile insurance policies will have a sample mean within $25 of the population mean the for each of the following sample sizes: 30, 50, 100, 400?

Reference no: EM13103593

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