Stats Solutions

(See Solution) The monthly expenditures on food by single adults in one city are normally distributed with a mean of $410 and a standard deviation of $70.

Question: The monthly expenditures on food by single adults in one city are normally distributed with a mean of $410 and a standard deviation of $70. What is the probability that the sampling error made in estimating the mean monthly expenditure of all single adults in that city by the mean of a random sample of 90 such adults will be at most $10?

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