A recent article in the Cincinnati Enquirer reported that the mean labor cost to repair a heat pump is $90 with a standard deviation of $22. Monte's Plumbing and Heating Service completed repairs on two heat pumps 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.© BrainMass Inc. brainmass.com June 3, 2020, 6:33 pm ad1c9bdddf
This solution explains the calculation of z values.