Question

the mean of15 observations is 32 .find the resulting mean,if each observation is: multiplied by 2

Answer 1

Mean =(n1---------n15)/15

32*15=(n1--------n15)

480=(n1+n2+n3+n4------n15)

If each is multiplied by two, it means that the whole equation will multiplied by 2

2(n1+n2+n3------n15)=480*2=960

Then sum of 15 observations after each multiplied by 2=960

Then,

Mean =960/15

Mean =64

I hope this much will help you