The mean of 10 observations is 12.4. If from each of the half of the observations 1 is substracted
and to each of the remaining half of the observations 2 is added find the mean of the new
observations.
Answers
given mean =12.4
number of observations=10
mean = sum of observations / number of the observations
12.4=sum of observations/10
sum of observations=12.4*10=124
if each of the half of the observations 1 is substracted
and to each of the remaining half of the observations 2 is added
new sum 124+5*(-1)+5*2=124-5+10 = 129
new mean = new sum /10
= 129/10
=12,9
mean of new observations = 12.9
Answer:
given mean =12.4
number of observations=10
mean = sum of observations / number of the observations
12.4=sum of observations/10
sum of observations=12.4*10=124
if each of the half of the observations 1 is substracted
and to each of the remaining half of the observations 2 is added
new sum 124+5*(-1)+5*2=124-5+10 = 129
new mean = new sum /10
= 129/10
=12,9
mean of new observations = 12.9