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Mathematics, 12.03.2020 20:21 carri9789
(6 points) Wasserman (1989) studied a process for the manufacturing of steel bolts. Historically, these bolts have a mean thickness of 10.0 mm and a standard deviation of 1.6 mm. In a quality check the engineer has a sample of 5 randomly selected and measured. (a) (2 points) Assuming a near normal distribution what are the mean and standard error (standard deviation of the sample mean) of these quality checks? (b) (2 points) A recent sample of five wafers yielded a sample mean of 10.4 mm. Find the probability of observing such a mean of something larger based on the historic mean and standard deviation. (c) (2 points) 90% of the means taken from samples of 5 should be smaller than what value?
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(6 points) Wasserman (1989) studied a process for the manufacturing of steel bolts. Historically, th...
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