The following table represents a summary by state for Medicare enrollment (in thousands) for 15 randomly selected states in 1998 (source: Statistical Abstracts of the United States, 1999).
665 3,757 623 757 541 448 478 2,728 103 771
224 86 623 1,373 713
(a) Test to determine whether the data are normal.
(b) If not, try a suitable transformation to make the transformed data approximately normal.
(c) Test for outliers. If an observation is extreme, would you classify it as an outlier?