The following figure is from the website of a U.S. national environmental laboratory. It displays sample mean

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The following figure is from the website of a U.S. national environmental laboratory. It displays sample mean concentrations, with 95% confidence intervals, of three radioactive substances. The text accompanying the figure explained that “the first plotted mean is 2.01.12.01.1 so there is a 95% chance that the actual result is between 0.9 and 3.1, a 2.5% chance it is less than 0.9, and a 2.5% chance it is greater than 3.1.” Is this a correct interpretation of a confidence interval? Explain. 

Concentration 6 1 2 Substance 3

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The Analysis Of Biological Data

ISBN: 9781319226237

3rd Edition

Authors: Michael C. Whitlock, Dolph Schluter

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