Samples of four units were taken from engine manufacturing procedure. The weight of the engine was measured (in lbs), and average and range was computed for each sample. After 25 samples, the following results were computed as per the table shown below. All points on the X and R charts fell in the control limits. The specification limits for weight of the engine are 823 17 lbs. If the weight is normally distributed and the distribution is centered at X, what percentage of product would you expect to fall outside of specification limits?
Upper control limit - 844 (Average), 72.6 (Range)
center line - 826.5(Average),36.2(Range)
lower control limit - 809(Average),0 (Range)