Use the following data to answer parts a, b, c, and d below (assume continuous data). Be sure to reproduce the frequency distribution and add columns for cumulative frequency and cumulative percentage.
Interval Frequency
90-99 4
80-89 7
70-79 11
60-69 9
50-59 8
40-49 7
30-39 5
20-29 3
10-19 2
0-9 1
a. Compute the 88^{th} percentile.
b. Compute the 33^{rd} percentile.
c. Compute the percentile rank for a score of 45.
d. Compute the percentile rank for a score of 90.