(See Steps) Choosing an appropriate sample size Managers at an automobile manufacturing plant would like to estimate the mean completion time of an assembly
Question: Choosing an appropriate sample size
Managers at an automobile manufacturing plant would like to estimate the mean completion time of an assembly line operation \(\mu\). The managers plan to choose a random sample of completion times and estimate \(\mathrm{M}\) via the sample. Assuming that the standard deviation of the population of completion times is 10.2 minutes. What is the minimum sample size needed for the managers to be \(90 \%\) confident that their estimate is within 1.5 minutes of \(\mu\) ?
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