B evaluate the null hypothesis using the critical

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Unformatted text preview: a) Write a null hypothesis for this investigation. b) Evaluate the null hypothesis using the critical value approach. c) Evaluate the hypothesis using the p ­value approach. Solution 1 (New solution): Ans: Adequate DO level = 4 mg/L or greater a) H0 : µ ≤ 4 mg/L Here, µ = population mean b) Critical value approach: • From given data (HW 10 Prob1) X = 1.973; S =0.504; n = 11 X −µ • T = S/ n • Determine α = 0.05 (95% confidence interval) • Critical value of T (d.f.=10) =1.812 (For our null hypothesis, we have to consider 1.812, one tail) 1.973 − 4.00 • T = =  ­13.33 0.504 / 11 •  ­13.33 < 1.812 • So, the null hypothesis cannot be rejected 1/5 CEE 202 –...
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This document was uploaded on 03/06/2014 for the course CEE 202 at University of Illinois, Urbana Champaign.

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