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Mathematics, 05.05.2020 01:55 bxbysoso
The amount of time it takes a mechanic to rebuild the transmission for a 2015 Cavalier car is being studied. A random sample of 36 mechanics who rebuild that transmission has a sample mean of 8.7 hours with a sample standard deviation of 2.1 hours. Construct a 90% confidence interval of the population mean time it takes a mechanic to rebuild the transmission. State the requirements, find the confidence interval to 2 decimal places, write a sentence that correctly interprets the confidence interval.
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