Question

1. The mean of 100 observations is 40. It is found that an
observation 53 was misread as 83. Find the correct mean.​

Answer 1

Answer:

39.7

Step-by-step explanation:

Mean = Sum of observations/ No. of observations

Sum/ 100 = 40

Sum = 4000

83-53 = 30

So, the correct sum would be 4000 - 30 = 3970

Correct mean = 3970/100 = 39.7

I hope it helped you