4) In order to attach the top of an aluminum soda can it must withstand pressures of 160 lb to 167 lb. Ideally it would withstand a much greater pressure of 260 lb to minimize the risk of injuring a consumer. Coke experimented with thinner aluminum cans. A sample of 175 thinner cans was found to withstand a mean of 269.1 lb of pressure with a standard deviation of 22.1 lb. Pick an appropriate ? and test the claim that the mean pressure that can be withstood by the thinner cans is greater than 260 lb. 5) Trials in an experiment with a polygraph include 98 results that include 24 cases of wrong results and 74 cases of correct results (based on data from experiments conducted by researchers Charles R. Honts of BSU and Gordon H. Barland of the Department of Defense Polygraph Institute). Use a 0.05 significance level to test the claim that such polygraph results are correct less than 80% of the time. 6) These are the lengths of ¾ in screws produced by a particular company. 0.757 0.740 0.744 0.744 0.758 0.754 0.724 0.765 0.763 0.740 0.757 0.736 0.738 0.76 0.737 0.722 0.76 0.758 0.761 0.725 0.743 0.759 0.724 0.724 -Test the claim that the screws have a mean length equal to ¾ in. at an appropriate significance level.
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4) In order to attach the top of an aluminum soda can it must withstand pressures of 160 lb to 167 lb.
Ideally it would withstand a much greater pressure of 260 lb to minimize the risk of injuring a consumer. Coke experimented with thinner aluminum cans. A sample of 175 thinner cans was found to withstand a mean of 269.1 lb of pressure with a standard deviation of 22.1 lb. Pick an appropriate ? and test the claim that the mean pressure that can be withstood by the thinner cans is greater than
260 lb.
5) Trials in an experiment with a polygraph include 98 results that include 24 cases of wrong results and
74 cases of correct results (based on data from experiments conducted by researchers Charles R. Honts
of BSU and Gordon H. Barland of the Department of Defense Polygraph Institute). Use a 0.05
significance level to test the claim that such polygraph results are correct less than 80% of the time.
6) These are the lengths of ¾ in screws produced by a particular company.
0.757 0.740 0.744 0.744 0.758 0.754
0.724 0.765 0.763 0.740 0.757 0.736
0.738 0.76 0.737 0.722 0.76 0.758
0.761 0.725 0.743 0.759 0.724 0.724
-Test the claim that the screws have a mean length equal to ¾ in. at an appropriate significance level.
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