Question

the mean of 12 observation is 63.8 . two of the observation was taken as 105 and 43 instead of 75 and 58 find correct mean.​

Answer 1

Answer:

62.55

Step-by-step explanation:

First, find the sum of the 12 numbers.

You do this by multiplying 12 to the mean, in this case being 63.8 to get the result of 765.60

Second, you get the difference of the incorrect information and the correct one and add or subtract it to the sum of the 12 numbers. There is a decrease of 15 from the incorrect information to the correct one, therefore we need subtract 15 from 765.60, getting the result of 750.60.

Lastly, you divide the new result by 12 again. 750.60 / 12 = 62.55

62.55