Class Frequency ------ 20–25 2 25–30 9 30–35 14 35–40 11 40–45 4 (Classes are continuous: a –b means a le x < b.) The mean of this distribution is:

  1. 33.25
  2. 35.75
  3. 34.71
  4. 32.5
Answer

A) 33.25

Using midpoints x: sum fx = 1330, sum f = 40, so barx = sum fxsum f = 33.25. SLO M-09-C-02 · Understanding

Mathematics MCQ · More Measures of Central Tendency MCQs · Practise