2.46 Traffic violations A company decides to examine the number of points its employees have accumulated in the last two years on a driving point record system. A sample of twelve employees yields the following observations:

0 5 3 4 8 0 4 0 2 3 0 1

a. Find and interpret the range.

b. Find and interpret the standard deviation s.

c. Suppose 2 was recorded incorrectly and is supposed to be 20. Redo parts a and b with the rectified data and describe the effect of this outlier.