Question 40
Measures of DispersionThe following are the masses (in kg) of members in a club: 59, 44, 53, 57, 49 40, 48 and 50. Calculate the variance of the distribution
- A.35
- B.36
- C.40
- D.50
Show the answer and explanation
Answer: A (35)
Explanation
Deviations from 50 are 9, −6, 3, 7, −1, −10, −2, 0; their squares add to 280. Variance = 280 ÷ 8 = 35.