338 Chapter 7 The Normal Distribution 6. Is it reasonable to treat the sample in the following normal quantile plot as coming from an approximately normal population? Explain. No 3 2 1 0 −1 −2 −3 −1 0 1 2 3 4 Answers are on page 341. USING TECHNOLOGY We use Example 7.36 to illustrate the technology steps. TI-84 PLUS Constructing normal quantile plots Step 1. Enter the data from Example 7.36 into L1 in the data editor. Step 2. Press 2nd, Y= to access the STAT PLOTS menu and select Plot1 by pressing 1. Step 3. Select On and the normal quantile plot icon. Step 4. For Data List, select L1, and for Data Axis, choose the X option (Figure A). Step 5. Press ZOOM and then 9: ZoomStat (Figure B). Figure A Figure B MINITAB Constructing normal quantile plots Step 1. Enter the data from Example 7.36 into Column C1. Step 2. Click on Graph and select Probability Plot. Choose the Single option and press OK. Step 3. Enter C1 in the Graph variables field. Step 4. Click OK (Figure C). Figure C
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