Posted by Anonymous on Monday, May 20, 2013 at 5:01pm.
a company decides to add a new program that prepares randomly selected sales personnel to increase their number of sales per month. The mean number of sales per month for the overall popualtion of sales people at this national company is 25 with a standard deviation of 4. The mean number of sales per month for those who participated in the new program was 29. Compute the effect size of the new sales program

statistics  MathGuru, Tuesday, May 21, 2013 at 5:34pm
Here is one formula for effect size:
Cohenâ€™s d = the difference between two means divided by a standard deviation.
I'll let you take it from here.