#11

Determine the minimum sample size required when you want to be 90% confident that the sample mean is within one unit of the population mean and =17.3. Assume the population is normally distributed.

A 90% confidence level requires a sample size of _______(round to the nearest whole number as needed)

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#13

Find the critical value t_c for the confidence level c=0.99 and sample size n=17.

t_c = ____(round to the nearest thousandth as needed)