Sample size for mean estimation
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An automobile manufacturer wants to estimate the mean gasoline mileage that its customers will obtain with its new compact model. How many sample runs must be performed in order that the estimate be accurate to within 0.25 mpg at 90% confidence? (Assume that σ = 2.0.)
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Solution Summary
The solution provides step by step method for the calculation of sample size . Formula for the calculation and Interpretations of the results are also included.
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