passwella.
Menu

JAMB Mathematics 2010 Question 48

Question 48

Measures of Dispersion

Find the standard deviation of 2, 3, 5 and 6.

  1. A.√(5/2)
  2. B.√10
  3. C.√6
  4. D.√(2/5)
Show the answer and explanation

Answer: A (√(5/2))

Explanation

The mean is 4. The squared deviations are 4, 1, 1, 4, total 10, so the variance is 10/4 = 5/2 and the SD is √(5/2).