East records 1n a process snow tnat the average rate 1s 50 per hour operator. Modifications to the process are made to try an increase in the average production rate. This new method is tried with 9 operators, whose production rates are 51, 48, 50, 56, 52., 54, 53, 49 and 55. Does this trial establish that the new method has a higher average production rate than the old 5%