Question

Mean and Standard deviation of 100 observation is 50 and 10 respectively. What will be the new mean and Standard deviation if each observation is multiplied by 3?

A 53 and 13 Correct Answer Incorrect Answer
B 53 and 10 Correct Answer Incorrect Answer
C 150 and 30 Correct Answer Incorrect Answer
D 150 and 10 Correct Answer Incorrect Answer
E 50 and 30 Correct Answer Incorrect Answer

Solution

Both mean and SD are affected by change in scale New Mean = 50*3 = 150 New SD = 10*3 = 30

Practice Next
×
×