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Average number of peaches per tree

A study of peach trees found that the average number of peaches per tree was 725. The standard deviation of the population is 105 peaches per tree. A scientist wishes to find the 90% confidence interval for the mean number of peaches per tree. How many trees does she need to sample to obtain an average accurate to within 18 peaches per tree?

A. 35

B. 56

C. 72

D. 93

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## Q : Compute the arithmetic mean

Compute the arithmetic mean and discuss what the answer in the context of the problem. Compute the standard deviation and discuss what the answers means in the context of the problem