The following data represent a simple random sample of ages of West Nile virus victims in the United States during 2004.

• 77 71 54 60 79 76 82 81 77 68 34

Use this data to construct a 99% confidence interval for the mean age of West Nile virus victims in 2004. Interpret your interval.

What could be done to increase the accuracy of the interval (make the interval shorter) without changing the level of confidence?

Construct a boxplot of this data and identify the outlier. Show all calculations.

Construct your 99% confidence interval with the outlier removed.

Comment on the effect the outlier has on the confidence interval.