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Question 12

What is the mean of the five numbers -3, -1, 0, 4 and 5?

  1. 2.6
  2. 5
  3. 1.25
  4. 1Correct answer

Explanation

The five numbers total -3 - 1 + 0 + 4 + 5 = 5, and dividing by the 5 numbers gives a mean of 1. Ignoring the minus signs makes the total 13 and the mean 2.6, but negative numbers reduce a total, so dropping their signs inflates the result.

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Question 12: What is the mean of the five numbers -3, -1, 0, 4 and 5? · Statistics and Probability · Questena