Practice Test Discussion

Q)

If the algebraic sum of deviations of 20 observations measured from 23 is 70, then mean of these observations would be?

    • Explanation

    According to the question

    We know the formula,

    Mean=sum of observationNumber of observation

    Sum of observation =70

    Number of observation=20

    ∴ Mean=7020=3.5

    Here observation starts from 23 

    ∴ Mean =23+3.5=26.5

    Hence, Option E is correct.

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