# TOM302 HW ch10 - TOM302 HW ch10 10.96 STEP1 H 0 µ ≥ 800...

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TOM302. HW ch10. 10.96 2 800 : , 800 : 1 1 0 STEP H H STEP < μ μ Level of significance: 05 . 0 = α Step3 Type of test: t test Step4 For this test, α = 0.05 and d.f. = (n - 1) =(30 - 1) = 29. Referring to the 0.05/2 = 0.025 column and the 29 th row of the t table, the critical values are t = -2.045 and t = 2.045 Step5 Decision Rule: Reject the null if computed t > = 2.045 OR < = -2.045, otherwise accept (fail to reject) the null. Step6 283 . 2 30 12 800 805 30 , 12 , 805 = - = = = = - t n s x Step7 Statistical Decision: Calculated test statistic falls in nonrejection region, do not reject(accept) H 0 . Step8 At the 0.05 level, the results do not cause us to doubt that the superintendent’s complaint justified 800 watts. 10.101

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Step1 30 . 0 : , 3 . 0 : 1 0 = π π H H Step2 Level of significance: 05 . 0 = α Step3 Type of test: z test Step4 Z=-1.96 and z=1.96 Step5 P=0.35, n=400
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