The variance of 15 observations is 4. If each observations increased by 9 find the variance of the resulting observations.

The variance of 20 observations is 5. If each observation is multiplied by 2 find the variance of the resulting observations.

The variance of 20 observations is 5. If each observation is multiplied by 2find the variance of the resulting observations.

The variance of 20 observations is 5. If each observation is multiplied by 2, find the new variance of the resulting observations.

The variance of 20 observations is 5. If each observation is multiplied by 2, find the new variance of the resulting observations.

The variance of 20 observations is 5. If each observation is multiplied by 2, find the new variance of the resulting observations.

The variance of 20 observations is 5. If each observation is multiplied by 2, find the new variance of the resulting observations.

The variance of 20 observations is 5. If each observation is multiplied by 2, find the new variance of the resulting observations.