454 Chapter 9 Hypothesis Testing MINITAB Testing a hypothesis about a proportion Step 1. Click on Stat, then Basic Statistics, then 1 Proportion. Step 2. Click Summarized Data, and enter the value of n in the Number of Trials field and the value of x in the Number of Events field. For Example 9.20, we use x = 54 and n = 100 (Figure D). Step 3. Click Options, and enter the value of p0 in the Test proportion field and the form of the alternate hypothesis in the Alternative field. For Example 9.20, we enter 0.5 for p0 and enter greater than as the alternate hypothesis. Step 4. Given significance level ��, enter 100(1 − ��) as the Confidence Level. For Example 9.20, �� = 0.05, so the confidence level is 100(1 − 0.05) = 95 (Figure E). Step 5. Check the Use test and interval based on normal distribution option and click OK. Step 6. Click OK (Figure F). Figure D Figure E Figure F EXCEL Testing a hypothesis about a proportion This procedure requires the MegaStat EXCEL add-in to be loaded. The MegaStat add-in can be downloaded from www.mhhe.com/megastat. Step 1. Load the MegaStat EXCEL add-in. Step 2. Click on the MegaStat menu and select Hypothesis Tests, then Proportion vs. Hypothesized Value... Step 3. Under the Observed column, enter the value of x in the p field (note that p automatically changes to x) and the sample size n in the n field. For Example 9.20, we use x = 54 and n = 100. Step 4. Under the Hypothesized column, enter the value of p0. We use p0 = 0.5.
navidi_monk_elementary_statistics_2e_ch7-9
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