The human resources manager for a large company commissions a study in which the employment records of 500 company employees are examined for absenteeism during the past year. The business researcher conducting the study organizes the data into a frequency distribution to assist the human resources manager in analyzing the data.
The frequency distribution is shown. For each class of the frequency distribution, determine the class midpoint, the relative frequency and the cumulative frequency.
Class Interval ........Frequency
0–under 2 ........            218
2–under 4 ........            207
4–under 6 ........             56
6–under 8 ........             11
8–under 10 .........            8