Spray Painting Procedure Recall that DS 6.1.8 contains a
Chapter 15, Problem 15.2.7(choose chapter or problem)
Spray Painting Procedure Recall that DS 6.1.8 contains a sample of paint thicknesses from production line A and that DS 9.3.2 contains a sample of paint thicknesses from production line B. (a) Make a plot of the empirical cumulative distribution functions of these two data sets. (b) What does a visual comparison of the two empirical cumulative distribution functions suggest about the difference between the distributions of the paint thicknesses from the two production lines? (c) Use the Kolmogorov-Smirnov test to assess the evidencethatthetwodistributionfunctionsaredifferent. (d) Use the rank sum test to assess the evidence that the two distribution functions are different. Obtain a 95% condence interval for the difference between the median paint thicknesses for the two production lines. On what assumption is the rank sum test based? Do you think that it is a reasonable assumption in this case?
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