The monthly incomes (in $1,000) from a random sample of eight workers in a factory are 4.2,
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The monthly incomes (in $1,000) from a random sample of eight workers in a factory are 4.2, 5.1, 7.8, 6.2, 8.2, 5.5, 6.7, and 9.1. Assume the population has a normal distribution. Give your answer for (a) and (b).
(a) Compute the standard error of the sample mean (in dollars).
(b) Compute a 95 % confidence interval for the mean of the population.
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Related Book For
Statistics For Business And Financial Economics
ISBN: 9781461458975
3rd Edition
Authors: Cheng Few Lee , John C Lee , Alice C Lee
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