Section 9.2 Hypothesis Tests for a Population Mean, Standard Deviation Known 427 USING TECHNOLOGY We use Example 9.14 to illustrate the technology steps. TI-84 PLUS Testing a hypothesis about the population mean when �� is known Step 1. Press STAT and highlight the TESTS menu. Step 2. Select Z–Test and press ENTER (Figure A). The Z–Test menu appears. Step 3. For Inpt, select the Stats option and enter the values of ��0, ��, ̄x, and n. For Example 9.14, we use ��0 = 74, �� = 8, ̄x = 76, and n = 80. Step 4. Select the form of the alternate hypothesis. For Example 9.14, the alternate hypothesis has the form �� ≠ ��0 (Figure B). Step 5. Highlight Calculate and press ENTER (Figure C). Note that if the raw data are given, the Z–Test command can be used by selecting Data as the Inpt option and entering the location of the data as the List option (Figure D). Figure A Figure B Figure C Figure D MINITAB Testing a hypothesis about the population mean when �� is known Step 1. Click on Stat, then Basic Statistics, then 1-Sample Z. Step 2. Choose one of the following: ∙ If the summary statistics are given, click Summarized Data and enter the Sample Size (80), the Sample Mean (76), the Standard Deviation (8), and the Test Mean (74) (Figure E). ∙ If the raw data are given, click Samples in Columns and select the column that contains the data. Enter the Standard Deviation. Step 3. Click Options and select the form of the alternate hypothesis. For Example 9.14, we select Not Equal. Given significance level ��, enter 100(1 − ��) as the Confidence Level. For Example 9.14, �� = 0.05 and the confidence level is 100(1 − 0.05) = 95. Click OK. Step 4. Click OK (Figure F). Figure E Figure F
navidi_monk_elementary_statistics_2e_ch7-9
To see the actual publication please follow the link above