Question

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

Answer 1

★$\huge\bf{\blue{\underline{Question:-}}}$

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

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★$\huge\bf{\red{\underline{Answer:-}}}$

15.4

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★$\huge\bf{\green{\underline{Explanation:-}}}$

Sum of the 10 observations = 16.3 * 10 =  163.

But let us remove the wrong data observation, then sum of 9 correct observations is =  163 - 32 = 131.

Now add the correct value of the 10th observation = 131 + 23 = 154

Now find the mean = 154 /10 = 15.4

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Answer 2

Answer:

Sum of the 10 observations = 16.3 * 10 = 163.

But let us remove the wrong data observation, then sum of 9 correct observations is = 163 - 32 = 131.

Now add the correct value of the 10th observation = 131 + 23 = 154

Now find the mean = 154 /10 = 15.4