Posted by Jill on Monday, October 31, 2011 at 9:19am.
A recent article in the Myrtle Beach Sun Times reported that the mean labor cost to repair a color television is $90 with a standard deviation of $22. Monte’s TV Sales and Service completed repairs on two sets this morning. The labor cost for the first was $75 and it was $100 for the second. Compute z values for each and comment on your findings.

Statistics  PsyDAG, Monday, October 31, 2011 at 12:17pm
Z = (scoremean)/SD
Insert values and calculate.