Mathematics, 06.08.2019 22:20 tessthetoast
Use the given degree of confidence and sample data to find a confidence interval for the population standard deviation sigma. assume that the population has a normal distribution. round the confidence interval limits to the same number of decimal places as the sample standard deviation. the mean replacement time for a random sample of 20 washing machines is 11.6 years and the standard deviation is 2.8 years. construct a 99% confidence interval for the standard deviation, sigma, of the replacement times of all washing machines of this type.
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Use the given degree of confidence and sample data to find a confidence interval for the population...
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