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Railways PYQCBT 1 2016

RRB NTPC · Question 93

If the standard deviation of a population is 6.5, what would be the population variance?

  1. 40.25

  2. 42.25

  3. 18.25

  4. 13

Show answer & explanation

Answer: (B) 42.25

Explanation

Variance is the square of the standard deviation: 6.5² = 42.25.