Question: In paper manufacturing, pulp brightness is an important performance characteristic. Customers require maximum pulp brightness with maximum uniformity (minimum variance). The company is testing two

In paper manufacturing, pulp brightness is an important performance characteristic. Customers require maximum pulp brightness with maximum uniformity (minimum variance). The company is testing two bleaching chemicals for effectiveness in achieving a brightness of 90. Assume that the data are normally distributed. (a) State and test the hypothesis that the brightness variances of the two chemicals are equal at = 0.05. (b) State and test the hypothesis that the brightness means for the two chemicals are equal at = 0.05. (c) Which chemical best fulfills the requirements of maximum brightness at minimum variance? using minitab

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