the mean of 5 observations is 9 what will be the new mean if each observation is increased by 3.
Answers
Answered by
0
Let , 5 observations be X1,X2,X3,X4,X5
Mean of 5 observations = X1+X2+X3+X4+X5/5
9 = X1+X2+X3+X4+X5/5
X1+X2+X3+X4+X5 = 45
A/Q,
Each observations is increased by 3.New observations = X1+3,X2+3,X3+3,X4+3,X5+3
New mean = X1+3+X2+3+X3+3+X4+3+X5+3/5
(X1+X2+X3+X4+X5)+3/5= 45+3/5 = 48/5 = 9.6
HENCE,
NEW MEAN = 9.6
Mean of 5 observations = X1+X2+X3+X4+X5/5
9 = X1+X2+X3+X4+X5/5
X1+X2+X3+X4+X5 = 45
A/Q,
Each observations is increased by 3.New observations = X1+3,X2+3,X3+3,X4+3,X5+3
New mean = X1+3+X2+3+X3+3+X4+3+X5+3/5
(X1+X2+X3+X4+X5)+3/5= 45+3/5 = 48/5 = 9.6
HENCE,
NEW MEAN = 9.6
Similar questions