The mean of 5 observations was calculated as 50 While rechecking it was found that the value of 21 was wrongly copied as 12. Find the mean.
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Answer:
51.8
Step-by-step explanation:
Mean = sum of observation ÷ total no of observation
As per question
Let the sum of 5 observation =x
As given 21 is misread as 12
The difference bw 21 & 12 = 9
Sum of observation is increase by 9
x/5 =50
x =250
Increase sum =259
New menan =259÷5=51.8
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