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Mathematics, 12.07.2019 17:10 meganldale15

In a random sample of 50 specimens, the average porosity (in percent) was 21 and the standard deviation σ = 3. how many specimens must be sampled so that a 95% confidence interval specifies the mean to within equation .6?

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In a random sample of 50 specimens, the average porosity (in percent) was 21 and the standard deviat...

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