442 Chapter 9 Hypothesis Testing USING TECHNOLOGY We use Example 9.17 to illustrate the technology steps. TI-84 PLUS Testing a hypothesis about a population mean when �� is unknown Step 1. Press STAT and highlight the TESTS menu. Step 2. Select T–Test and press ENTER (Figure A). The T–Test menu appears. Step 3. Choose one of the following: ∙ If the summary statistics are given, select Stats as the Inpt option and enter ��0, ̄x, s, and n. ∙ If the raw data are given, select Data as the Inpt option and enter the location of the data as the List option. For Example 9.17, the sample has been entered in list L1. Step 4. Select the form of the alternate hypothesis. For Example 9.17, the alternate hypothesis has the form ≠ ��0 (Figure B). Step 5. Highlight Calculate and press ENTER (Figure C). Figure A Figure B Figure C MINITAB Testing a hypothesis about a population mean when �� is unknown Step 1. Click on Stat, then Basic Statistics, then 1-Sample t. Step 2. Choose one of the following: ∙ If the summary statistics are given, click Summarized Data and enter the Sample Size, the Mean, and the Standard Deviation for the sample. ∙ If the raw data are given, click Samples in Columns and select the column that contains the data. For Example 9.17, the sample has been entered in column C1. Step 3. Enter ��0 in the Test Mean field. Step 4. Click Options and select the form of the alternate hypothesis. For Example 9.17, we select Not Equal. Given significance level ��, enter 100(1 − ��) as the Confidence Level. For Example 9.17, since �� = 0.01, the confidence level is 100(1 − 0.01) = 99. Click OK. Step 5. Click OK (Figure D). Figure D
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