A random survey of 80 students found they spent a mean of 21 hours in class per week with standard deviation of 3 hours per week. Find the $95 \%$ confidence interval for the population mean.

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The Answer of A random survey of 80 students found they spent a mean of 21 hours in class per week with standard deviation of 3 hours per week. Find the $95 \%$ confidence interval for the population mean.

A Random Survey of 80 Students Found They Spent a Mean