Question

The data below shows the number of kilowatt hours of electricity used by the tenants of a small apartment building in a given month. What is a cumulative frequency table that represents the data?
80 85 86 90 96 75 66 70
99 65 70 99 70 73 64 92
72 81 88 91 93 69 77 82

Answer 1

A.
Kilowatt Hours Frequency Cumulative Frequency
60-69 7 7
70-79 4 11
80-89 7 18
90-99 6 24

B.
Kilowatt Hours Frequency Cumulative Frequency
60-69 4 4
70-79 7 11
80-89 6 17
90-99 7 24

C.
Kilowatt Hours Frequency Cumulative Frequency
60-69 7 24
70-79 4 24
80-89 5 24
90-99 6 24

D.
Kilowatt Hours Frequency Cumulative Frequency
60-69 4 4
70-79 6 10
80-89 7 17
90-99 7 24