The mean of 10 observations is 16.3 , by an error one observation is registered as 32 instead of 23.Find the correct mean.

Answers (1)

Sum of 10 observations= 10x16.3 = 163

Let remove the incorrect observation and add the the correct one = 163 - 32 + 23 = 154

Hence the correct mean=154/10 =15.4

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