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The mean of 100 observations was calculated as 40. It was founder later on that one of the observation was misread as 83 instead of 53. The correct mean is :
Answer & Solution
Correct Answer:
Option
B
Difference = 53 - 83 = - 30
Change in average
= $$\frac{- 30}{100}$$
= - 0.3
So, correct average
= 40 - 0.3
= 39.7
Change in average
= $$\frac{- 30}{100}$$
= - 0.3
So, correct average
= 40 - 0.3
= 39.7
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