Question

Weight of the students in a class is represented in an ungrouped frequency table.

Weight (Kg)	Frequency
30	4
35	5
40	7
45	3
50	2

What is the less than type cumulative frequency of the data value of 45?

• A. 7
• B. 3
• C. 16
• D. 19

Answer 1

The correct option is D 19

The progressive sum of the frequencies from the first data value to a particular data value is less than cumulative frequency.

Weight (kg)	Frequency	Cumulative Frequency
30	4	4 = 4
35	5	5+4 = 9
40	7	9 +7 = 16
45	3	16+3 = 19
50	2	19+2 = 21

The cumulative sum of the frequencies from the first data 30 value to a data value 45 is 19, so 19 is the less than cumulative frequency of the 45 data value.