Posted by StudentD on Wednesday, August 15, 2012 at 12:35pm.
Faculty in the psychology department at APUS consume an average of 5 cups of coffee per day with a standard deviation of 1.5. The distribution is normal. How many cups of coffee would an individual at the 25th percentile drink per day?
A. 4
B. 5
C. 6
D. 7

statistics  PsyDAG, Thursday, August 16, 2012 at 1:58pm
Z = (scoremean)/SD
Find table in the back of your statistics text labeled something like "areas under normal distribution" to find the proportion (.25) related to a Z score. Insert the values into the above equation and solve for the score.