Question

Choose the correct option(s) according to the following table:
$\begin{array}{cccccc}Class& \text{0-20}& \text{20-40}& \text{40-60}& \text{60-80}& \text{80-100}\\ Frequency& \text{10}& \text{7}& \text{16}& \text{18}& \text{8}\end{array}$

• A. True
• B. False
• C. Frequency of class interval (20-40) is 16.
• D. Frequency of class interval (20-40) is 7.

Answer 1

Answer: (B), (D)

The correct options are
B

False

D

Frequency of class interval (20-40) is 7.

$\begin{array}{cccccc}Class& \text{0-20}& \text{20-40}& \text{40-60}& \text{60-80}& \text{80-100}\\ Frequency& \text{10}& \text{7}& \text{16}& \text{18}& \text{8}\end{array}$
Lower limit of a class interval is the smallest value of the class interval. In the class interval (20 - 40), smallest value is 20. So 20 is lower limit of class interval ( 20 - 40).
Frequency is the value in the column under that class interval. So in the class interval ( 20 - 40 ) frequency is 7