Find the minimum sample size : How many commuters must be randomly selected to estimate the mean driving time μ of Chicago commuters? We want 99% confidence that the sample mean is within 6.1 minutes of the population mean, and the population standard deviation is known to be 14.1 minutes.
Added by Phillip R.
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1, z-value for 99% confidence level = 2.576, population standard deviation (σ) = 14.1 Show more…
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