Question

assumed mean of nine observation is calculated as 38 but one observation 27 is taken instead of 72 find actual mean

Answer 1

Original mean=38 No. Of observations=9 Sum of the observations=38*9 =342 But 1 observation is 72 not 27 Therefore Actual sum of observations=342-27+72 =387 Actual mean= 387/9 =43

Answer 2

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