Question

deviation of 20 observation is root 6 if each observation is multiplied by 3 find the standard deviation and variance​

Answer 1

Answer:

SD= 3root 6

Variance= 54

Step-by-step explanation:

When a constant is multiplied with observation SD is also multiplied with the constant and the variance is multiplied with square of constant.

Here initially SD = root 6

Variance = 6

then new SD = root 6*3

new variance = 6* 9= 54