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Statistics · Class 9 · CBSE Mathematics

A data set has values 2, 4, 6 and 8 with corresponding frequencies 3, 5, 4 and 2. What is its mean?

Practice question from Statistics (Class 9 · CBSE Mathematics), with the correct answer and a step-by-step solution.

hard · MCQ · Q-797483

A data set has values 2, 4, 6 and 8 with corresponding frequencies 3, 5, 4 and 2. What is its mean?

  1. A.33/7Correct answer
  2. B.66/7
  3. C.5
  4. D.6

Solution

The total frequency is 3+5+4+2=143+5+4+2=14. The sum of the observations multiplied by their frequencies is 2(3)+4(5)+6(4)+8(2)=662(3)+4(5)+6(4)+8(2)=66. Therefore, mean =6614=337=\frac{66}{14}=\frac{33}{7}.

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