MATH 226 - 11.7.07

MATH 226 - 11.7.07 - z =(16.3 – 14(10√(200 = 3.25...

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MATH 226 – November 7, 2007 Hypothesis testing o Example 34 X = blood lead concentration in black children less than 5 years old μ = EX H 0 : μ = 14 (μg/dL) H a : μ > 14 Test statistic: Z = (xbar – 14)/(s/√(200)) ~ N(0,1) under H 0 Large values of Z count against H 0 Experiment: xbar = 16.3, s = 10
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Unformatted text preview: z = (16.3 – 14)/(10√(200)) = 3.25 P-value = P(Z ≥ 3.25) = 1 – P(Z ≤ 3.25) = 1 – 0.9994 = 0.0006 We have strong evidence that the blood lead concentration mean of young black children is above 14 μg/dL. (Statistically significant)...
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This note was uploaded on 04/07/2008 for the course MATH 226 taught by Professor Daepp during the Fall '07 term at Bucknell.

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