A study by a chemical company compared the drainage
Chapter 16, Problem 16.39(choose chapter or problem)
A study by a chemical company compared the drainage properties of two dierent polymers. Ten different sludges were used, and both polymers were allowed to drain in each sludge. The free drainage was measured in mL/min. Sludge Type Polymer A Polymer B 1 2 3 4 5 6 7 8 9 10 12.7 14.6 18.6 17.5 11.8 16.9 19.9 17.6 15.6 16.0 12.0 15.0 19.2 17.3 12.2 16.6 20.1 17.6 16.0 16.1(a) Use the sign test at the 0.05 level to test the null hypothesis that polymer A has the same median drainage as polymer B. (b) Use the signed-rank test to test the hypotheses of part (a).
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