The target value for the diameter of a certain type of driveshaft is .75 in. The size of the shift in the average diameter considered important to detect is .002 in. Sample average diameters for successive groups of shafts are as follows: .7507, .7504, .7492, .7501, .7503, .7510, .7490, n 5 4 5 .10 h 5 .20

.7497, .7488, .7504, .7516, .7472, .7489, .7483, .7471,

.7498, .7460, .7482, .7470, .7493, .7462, .7481. Use the computational form of the CUSUM procedure with to see whether the process mean remained on target throughout the time of observation.