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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.
Mercury
A heavy metal that can be found in the environment and in certain foods, such as fish, and is toxic to humans in high amounts.
Pesticides
Chemical substances used to eliminate or control pests that threaten agriculture, public health, or comfort.
Iodine
A trace element essential for the synthesis of thyroid hormones, which regulate metabolism, growth, and development.
Foodborne Illnesses
Illnesses resulting from the consumption of contaminated food, typically caused by bacteria, viruses, or parasites.
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