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An EPA standard requires lead in lake water to be LESS than 4 ppb (parts/billion). A studied lake had 11 samples with a mean of
An EPA standard requires lead in lake water to be LESS than 4 ppb (parts/billion). A studied lake had 11 samples with a mean of 2.8 ppb and sample standard deviation of 1.9 ppb. The concentration of lead can be assumed normally distributed. Is the lake concentration of lead LESS than the EPA standard? Use 5% significance level. | What is the Table A3 CRITICAL VALUE for the
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Introductory Statistics Exploring The World Through Data
Authors: Robert Gould, Colleen Ryan
2nd Edition
9780321978271
