Mathematics, 03.12.2019 10:31, amontes189gmialcom
An industrial designer wants to determine the average amount of time it takes an adult to assemble an “easy to assemble” toy. a sample of 16 times yielded an average time of 19.9 minutes, with a sample standard deviation of 6 minutes. assuming normality of assembly times, provide a 90% confidence interval for the mean assembly time.
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