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, 1, 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.
(a) 1.5; (b) LCL = 0, and UCL = 5.2.
Business
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