Samples of size 9 are collected from a process every half hour. After 30 samples have been collected, we calculate x-double bar=610 and S-bar=17.82. Assume that the quality characteristic is normally distributed.

a.) Suppose that if a product falls below 580, it must be scrapped; and if it falls above the 620, it must be reworked. Compute for the percentage scrap and rework of this process.

the answer is 0.0516, 0.2946. what is the solution