Question

The data below shows the number of hours a week in average group of students spend volunteering for community service projects what is a cumulative frequency table that represents the data. 4, 5, 10, 21, 6, 2, 9, 8, 12, 15, 8, 14, 6, 4, 6, 11, 3, 2, 9, 16, 22, 23

Answer 1

Answer:

The correct option is D.

Step-by-step explanation:

The given data set is

4, 5, 10, 21, 6, 2, 9, 8, 12, 15, 8, 14, 6, 4, 6, 11, 3, 2, 9, 16, 22, 23

A running total of the frequencies is called Cumulative frequency.

$Cf_n=f_1+f_2+...+f_n$

$Cf_n=Cf_{n-1}+f_n$

Hours          data                  frequency       cumulative frequency      

0-4            4,2,4,3,2                   5                         5+0=5

5-9            5,6,9,8,8,6,6,9         8                         5+8=13

10-14         10,12,14,11                  4                         13+4=17

15-19          15,16                        2                          17+2=19

20-24        21,22,23                  3                          19+3=22

Therefore the correct option is D.

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