Question

If a frequency distribution for the number of persons x in a household is prepared with class intervals (1 – 4), (5 – 8), (9 – 12) etc, then the number of persons x belonging to class interval (5 – 8) satisfies.

(a) 5 < x < 8

(b) 5 ≤ x < 8

(c) 5 < x ≤ 8

(d) 5 ≤ x ≤ 8

Answer 1

Correct option is (d) 5 ≤ x ≤ 8

Since the intervals need to include the values of the limits too, answer is 5 ≤ x ≤ 8.