A Woodworker Is Concerned About the Quality of the Finished

Short Answer

A woodworker is concerned about the quality of the finished appearance of her work. In sampling units of a split-willow hand-woven basket, she has found the following number of finish defects in ten units sampled: 4, 0, 3, 1, 2, 0, 7, 2, 0, 2.
(a) Calculate the average number of defects per basket.
(b) If 3-sigma control limits are used, calculate the lower control limit and upper control limit.