Hey, these questions are due really soon and all help is appreciated !!

choose the definition for the function.

The mean is 12 and std dev 2.8
The max is 18 and min is 8
One std dev would be:
If you add 2.8 + 12 = 14.8
If you subtract 12-2.8 = 9.2
Two std dev would be:
14.8 + 2.8 = 17.6
9.2-2.8 = 6.4
All of the data falls within 2 std deviations to the left and 3 std deviations to the right of the mean.