Find probability that random sample of polocies have mean


The mean annual cost of automobile insurance is 939 assume that the standard deviation is 245. a) what is the probability that a simple random sample of automobile insurance polocies will have a sample mean within 25 of the popluation mean for each of the following sample sizes 30,50,100, and 400?

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Basic Statistics: Find probability that random sample of polocies have mean
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