Mathematics, 14.02.2020 01:19, ariellake8551
A manufacturer of piston rings for automobile engines frequently tests the width of the rings for quality control. Last week, a random sample of 15 rings were measured, and the mean and standard deviation of the sample were used to construct a 95 percent confidence interval for the population mean width of the rings.
A) Calculate the 99% two-sided confidence interval on the true mean piston diameter.
B) Calculate the 95% one-sided lower confidence interval on the true mean piston diameter.
Answers: 3
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