Question

The cost of electricity (in $) was recorded for a random sample of 50 cities in a country. These data are as follows:

9.0	9.0	9.5	9.6	10.2	10.8	10.9	11.1	11.4	11.6
11.9	12.3	12.7	12.8	12.9	13.0	13.0	13.5	13.7	13.9
14.1	14.3	14.4	14.7	14.8	14.8	14.9	14.9	15.0	15.1
15.3	15.4	15.7	16.3	16.5	16.6	16.7	16.8	17.1	17.2
17.5	17.8	18.3	18.5	18.7	19.1	19.7	20.2	20.6	21.3

A “less than” frequency distribution is constructed by using equal-sized classes. The first class is “9.0 but less than 10.8”. What is the last class in this “less than” frequency distribution?

Select one:

a. 21.0 but less than 22.0

b. 20.4 but less than 22.2

c. 19.8 but less than 21.6

d. 19.5 but less than 21.3

Answer 1