The time ( in minutes ) to fill out the teacher evaluation
form for the course were as follow:
18, 19, 12, 18, 20, 15, 17, 19, 23, 30, 21, 16, 44, 17, 15,
12, 18, 26, 19, 12, 23, 22, 35, 16
(a) Find the range, the quartiles (Q1, Q3), the variance, the
standard deviation.
(b) Draw a box-plot for the given data set.
(c) Find the percentile rank of the time of 20 minutes