Class Frequency ------ 0–20 6 20–40 10 40–60 16 60–80 12 80–100 6 (Classes are continuous: a –b means a le x < b.) The mean of this distribution is:

  1. 50.8
  2. 50
  3. 52.75
  4. 60.8
Answer

A) 50.8

Using midpoints x: sum fx = 2540, sum f = 50, so barx = sum fxsum f = 50.8. SLO M-09-C-02 · Understanding

Mathematics MCQ · More Measures of Central Tendency MCQs · Practise