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Mathematics, 15.04.2020 23:29 angellong94
Suppose that the amount of a weekly grocery bill of all households in a metropolitan area is distributed with a mean of $140. If $35 is the standard deviation of amount of grocery bill of a random sample of 49 households selected from this metropolitan area, find the probability that average amount of grocery bill of such a sample will be(a) more than $145,(b) less than $140,(c) between $132 and $148.
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