Proprtions below a given value
Proportion below 10 , if the mean is 20 and standard deviation is 6.

Proportion below 23 , if the mean is 20 and standard deviation is 6.

Proportions above a given value
Proportion above 34 , if the mean is 20 and standard deviation is 6.

Proportions between two values
Proportion between 10 and 23 , if the mean is 20 and standard deviation is 6.
