The accompanying observations are precipitation values during March over a 30-year perio...

The accompanying observations are precipitation values during March over a 30-year period in Minneapolis-St. Paul.

a. Construct and interpret a normal probability plot for this data set.

b. Calculate the square root of each value and then construct a normal probability plot based on this transformed data. Does it seem plausible that the square root of precipitation is normally distributed?

c. Repeat part (b) after transforming by cube roots.