the mean of 40 observations was 200. it was detected on rechecking that the value of 65 was wrongly copied as 25 for computation of mea.Find the correct mean.
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Answer:
8040 is the correct mean
Step-by-step explanation:
Given
Number of observations= 40
Mean= 200
Mean= Sum of the observations/Number of the observations
200=Sum of the observations/40
200x40= Sum of the observations
8000=Sum of the observations
Wrong observation=25
Therefore, 8000-25
= 7975
Correct observation=65
Therefore, 7975+65
= 8040
Hence, 8040 is the correct mean
Hope it helps!!
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