Question

Assertion (A): When class intervals are 10 - 20, 20 - 30, 30 - 40 etc, 30 is included in 30 - 40 class.

Reason (R): In 20 - 30 all values from 20 - 29 are included.

Options

• Both A and R are true and R is the correct reason for A.

• Both A and R are true but R is the incorrect reason for A.

• A is true but R is false.

• A is false but R is true.

Answer 1

Both A and R are true and R is the correct reason for A.

Explanation:

In a continuous frequency distribution, the upper limit of one class interval is excluded from that class but included in the next. As a result, in the class intervals 10 - 20, 20 - 30, and 30 - 40, the value 30 belongs to the 30 - 40 class rather than 20 - 30. This is because in the 20 - 30 interval, only values between 20 and 29.9 are counted.