Better World Technologies claims to have produced a revolutionary new jackhammer with less vibration, reduced noise and energy input, fewer moving parts, and greater impact strength. Independent...


Better World Technologies claims to have produced a revolutionary new jackhammer with less vibration, reduced noise and energy input, fewer moving parts, and greater impact strength. Independent random samples of conventional jackhammers and new jackhammers were obtained. The impact strength of each, using heavy-duty concrete breakers, was measured (in ft-lb) at 75 psi. The data are given in the following table.


Independent random samples of almonds from two suppliers in the United Kingdom were obtained, and the amount of protein (in grams) per 100 grams of edible portion was measured for each portion. SBP claims that their almonds contain more protein than any other brand. Use the Wilcoxon rank-sum test with a = 0.01 to compare the population median amounts of protein in SBP and WTL International almonds. Do you believe the SBP claim? Why or why not? Find the p value for this test.



May 04, 2022
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