The data represent the time spent waiting in line (in minutes) for the Demon Roller Coaster for 100 randomly selected riders. Retrieve the data 7_3_13 at www.pearsonhighered.com/sullivanstats using the file format of your choice for the text you are using.

(a) Draw a relative frequency histogram with lower class limit of the first class equal to 0 and class width 20.

(b) Comment on the shape of the distribution.

(c)Draw a normal probability plot to assess the normality of the random variable "wait time."