An appliance manufacturer wants to contract with a repair shop to handle authorized repairs in Indianapolis. The company has set an acceptable range of repair time of 46.00 minutes to 88.00 minutes. Two firms have submitted bids for the work. In test trials, Firm A had a mean repair time of 66.00 minutes with a standard deviation of 4.00 minutes; and the other firm, Firm B, had a mean repair time of 67.00 minutes with a standard deviation of 5.25 minutes.

Given the minimum threshold value of 1.00 for process capability, which firm would you choose? (Enter FIRM A, FIRM B or NONE):Blank 7

NOTE: All values should be rounded to the nearest hundredth (two decimal after dot, for example 9.99)

Compute the following capability indices for both firms