1)

Partial frequency distribution and partial cumulative frequency distribution for a particular sample of size 68 are given. Calculate the frequency of class 41-60. Round to 0.001 of the correct value.

Class	Frequency	Relative Frequency
1-20
21-40
41-60
61-80		0.25
81-100

Class	Cumulative Frequency
<=20	10
<=40	14
<=60
<=80	58
<=100

2)

Below you are given the frequency distribution for the examination scores students. Calculate the relative cumulative frequency for the class <=79. Round to 0.001 of the correct value.

Class	Frequency
50-59	10
60-69	15
70-79	8
80-89	2
90-100	17