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Unformatted text preview: STA 2023 Project 3 The purpose of this project is to show you how to use Minitab to construct confidence intervals and implement test of hypotheses. 1. Review Exercise 7.45 in the McClave text. We will be using the data in this exercise to construct confidence intervals with various confidence coefficients for p = the true proportion of all truck drives who suffer from sleep apnea. 2. Start up Minitab. Click in the Session window. 3. In the Stat menu, select Basic Statistics > 1 Proportion . A window titled 1 Proportion will come up. Click on the radio button Summarize Data . (a) Click in the rectangular white box to the right of Number of trials and type the sample size from Exercise 7.45 of McClave in the box. (b) Hit the TAB key on your computer to move the cursor into the box to the right of Number of Successes . Type in the number of truck drivers in the sample who suffered from obstructive sleep apnea. (c) Click on the button labelled Options . (d) If necessary, type 95.0 in the box to the right of Confidence level (e) For now, dont worry about the entries in the Test proportion and Alternative boxes. (f) Check the box next to the phrase Use test and interval based on normal distribution . (g) Click OK (h) Click OK again QUESTION 1: Based on the data in McClaves text, what is the estimate for the proportion of all truck drivers who suffer from obstructive sleep apnea? QUESTION 2: What is a 95% confidence interval for the proportion of all truck drivers who suffer from obstructive sleep apnea? 4. In the Edit menu, select Edit Last Dialog ....
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- Fall '08