A calling agency has data showing that the average response time is 5.6 minutes with a standard deviation of 1.

A calling agency has data showing that the average response time is 5.6 minutes with a standard deviation of 1.8. The manager wants to know how much time is required for 75% of all calls to be handled (in other words, the value below which 3/4 of response times fall). (Show the curve you created for this exercise). (HINT: first find the Z score and then use the Z-score formula, but solve for X given a particular value of Z)