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Mathematics, 04.12.2019 04:31, karsynraine8224
Amanufacturer claims that the average ten- sile strength of thread a exceeds the average tensile strength of thread b by at least 12 kilograms. to test this claim, 50 pieces of each type of thread were tested under similar conditions. type a thread had an aver- age tensile strength of 86.7 kilograms with a standard deviation of 6.28 kilograms, while type b thread had an average tensile strength of 77.8 kilograms with a standard deviation of 5.61 kilograms. test the manufacturer’s claim using a 0.05 level of significance
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Amanufacturer claims that the average ten- sile strength of thread a exceeds the average tensile str...
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