The accompanying observations are precipitation values during March over a 30-year period in Minneapolis-St. Paul.
![](https://test.transtutors.com/qimg/affc4c89-1443-4fcd-9938-07872b9190f3.png)
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.