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Mathematics, 24.03.2020 17:59 ajadegipson6784
One step in the manufacture of a certain metal clamp involves the drilling of four holes. In a sample of 150 clamps, the average time needed to complete this step was 72 seconds and the standard deviation was 10 seconds. (a) Find an 87% confidence interval for the mean time needed to complete the step. (b) What is the confidence level of the interval (69, 75)
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One step in the manufacture of a certain metal clamp involves the drilling of four holes. In a sampl...
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