How to choose an appropiate sample size
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Managers at an automobile manufacturing plant would like to estimate the mean completion time of an assembly line operation, u. The managers plan to cheese a random sample of completion times and estimate u via the sample. Assuming that the standard deviation of the population of completion times is 10.4 minutes, what is the minimum sample size needed for the managers to be 95% confident that their estimates is within 2.0 minutes of u?
Carry your intermediate computations to at least three decimal places. Write your answer as a whole number (and make sure that it is the minimum whole number that satisfies the requirements.
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Solution Summary
The solution examines sample sizes to determine a 95% confidence interval within 2.0 minutes.
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