Multiple choice

Find the mean of the following distribution: ${ X }{ i }$ 12 13 14 15 16 17 18 ${ f }{ i }$ 1 3 4 8 10 3 1

  1. 15.1

  2. 15.2

  3. 14.9

  4. 15.0
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A Correct answer
AI explanation

The mean is calculated by dividing the sum of each value multiplied by its frequency by the total frequency. The total frequency is 1 + 3 + 4 + 8 + 10 + 3 + 1 = 30, and the sum of the products is 453. Dividing 453 by 30 gives a mean of 15.1.

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