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Two students computed the mean of the same grouped data: Anita used the direct method and got 34.6, Bina used the step-deviation method.
What should Bina's answer be?

Class 10Mean of Grouped DataStatistics and Probability
  • A34.6
  • BSlightly different because the method changes the value
  • CAlways a rounded integer
  • DHalf of Anita's value

Step-by-Step Solution

All three standard methods (direct, assumed mean, step-deviation) give exactly the same mean. So Bina must also get 34.6.
Answer: A) 34.6

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