Reducing wrinkles. Durable press treatment of fabrics reduces wrinkling. Thewrinkle
Chapter 0, Problem 26.12(choose chapter or problem)
Reducing wrinkles. Durable press treatment of fabrics reduces wrinkling. Thewrinkle recovery angle measures how well a fabric recovers from wrinkles.Higher is better. Here are data on the wrinkle recovery angle (in degrees) for twotypes of durable press treatment: (a) Arrange the observations in order and find their ranks.(b) Take W to be the rank sum for Permafresh 48. What is the value of W?(c) Use software: does W provide significant evidence that the recovery anglesfor the two treatments are systematically different?
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