Question

Mean of 50 observations was found to be 80.4. But later on it was discovered that 96 was misread as 69 at one place. Find the correct mean. If to each observation a constant value k is added, how is the mean affected?

Answer 1

80.4*50=4020
96-69=27
4020+27=4047
New mean =4047/50=80.94

Answer 2

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