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To estimate the mean number of visitors(per/week) to the W.I.U Main Library, a random sample of...

To estimate the mean number of visitors(per/week) to the W.I.U Main Library, a random sample of 12 weeks selected. The sample mean is found to be 2509 visitors with a sample standard deviation of 630 visitors.

(a) Estimate the mean number of visitors per week to the WIU library with a 95% confidence interval.

(b) What is the critical value and degrees of freedom in above confidence interval?

(c) What does this interval mean?

Math   Statistics-And-Probability   
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