Open Excel File "Question 3".

Ok. Now back to the Casino! You want to see if people are doing well at the casino when to comes to their winnings. You walk around the casino and you collect the following data sets that represent simple random samples from a population of casino customers' winnings whose known mean is $100. Complete parts (a) through (f) below.

A. Compute the sample mean of each data set.

B. For each data set, construct a 95% confidence interval about the population mean.

C. What impact does the sample size n have on the width of the interval?

D. Suppose that the data value $106 was accidentally recorded as $061. For each data set, construct a 95% confidence interval using the mis-entered data.

E. Which data set confidence intervals, if any, still capture the population mean, $100?

F. Is the procedure for constructing the confidence interval robust?

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