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Two different types of injection-molding machines are used to form plastic parts. Two random samples, each of size 300, are selected. 15 defective parts are found in the sample from machine 1 and 8 defective parts are found in the sample from machine 2. Is it reasonable to assume that both machines have the same defective rate? Use α = 0.05.
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Two different types of injection-molding machines are used to form plastic parts. Two random samples...
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