Question

The standard deviation of six observations is 4. If each observation is multiplied by 3, then the
variance of the resulting observations is
1) 12
2) 144
3) 16
4) 9

Answer 1

Answer:

Find the mean, or average, of your variables. To calculate the mean, add the individual values and divide by number of observations. Subtract each observation from the mean to determine how much the individual observation varied or deviated from the mean. Take each individual deviant and square it.

Answer 2

Answer:

The standard deviation of six observations is 4. If each observation is multiplied by 3, then the

variance of the resulting observations is

1) 12

2) 144

3) 16

4) 9