Question: Refer to the Statistics in Context section of Chapter 7 concerning monthly changes in the Canadian to U.S. exchange rate. A computer calculation gives

Refer to the Statistics in Context section of Chapter 7 concerning monthly changes in the Canadian to U.S. exchange rate. A computer calculation gives  = -.0021 and s = .0234 for the n = 41 monthly changes. Find a 95% confidence interval for the mean monthly change.

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