211+HW+5+Practice+Solution+Guide

211+HW+5+Practice+Solution+Guide - So Far - Questions about...

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Issue: Time (minutes) to do a task. Time (minutes) to do a task. Time (minute BusQues: Is mean time less than 100? Is mean time not 100? Is mean time Data: Random sample n = 50 Random sample n = 50 Random samp x-bar = x-bar = s = s = Normal Test for Mean Normal Test for Mean t-Test 1.Hypotheses: Ho: mu = 100 Ho: mu >= 100 Ho: mu >= 50 Ha: mu < 100 Ha: mu < >100 Ha: mu < 50 2.Test Statistic: 1 - x-bar 1 - x-bar 1 - t = (x-bar - 3.Signif Level: alpha = 0.05 alpha = 0.05 alpha = 0.05 4.Reject Rule: 5.Calculatiions: 1 - x-bar = 97.14 1 - x-bar = 105.0 1 - x-bar = s = 2 - p-value = 0.022 2 - p-value = 0.0004 t = 2 - p-value = 6.Conclusion: Reject Ho Reject Ho Reject Ho Sample Results: Sample Results: Sample Results 95.1 99.4 40.3 97.3 111.3 40.4 96.1 92.3 61.4 86.5 107 49.3 92.4 100.2 35.4 97 106 39 79.1 110.5 37 103 112.5 58.4 81.2 104.2 41.4 100.8 108.8 37.1 95.6 95.5 41.1 98.3 106.2 48.9 81.2 105.8 59 89.8 116.5 37.9 88.7 97.4 51.1 106.2 111.9 36.3 81.9 110.9 46.8 93.4 93.6 32.5 82.9 119
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This note was uploaded on 07/17/2011 for the course STATS 211 taught by Professor Dunne during the Spring '07 term at University of Dayton.

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211+HW+5+Practice+Solution+Guide - So Far - Questions about...

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