Operation Manual

Chapter 13: Inferential Statistics and Distributions 227
• Select Yes if you want the variances pooled. Population variances are assumed to be equal.
To select the
Pooled option, move the cursor to Yes, and then press Í.
Selecting Color
Color spinner menu offers a color graph for Draw. Press | and ~ to scroll through the color options to
set a color.
Selecting Calculate or Draw for a Hypothesis Test
After you have entered all arguments in an inferential stat editor for a hypothesis test, you must select
whether you want to see the calculated results on the home screen (Calculate) or on the graph screen
(
Draw).
•
Calculate calculates the test results and displays the outputs on the home screen.
• Draw draws a graph of the test results and displays the test statistic and p-value with the graph.
The window variables are adjusted automatically to fit the graph.
To select Calculate or Draw, move the cursor to either Calculate or Draw, and then press Í. The
instruction is immediately executed.
Selecting Calculate for a Confidence Interval
After you have entered all arguments in an inferential stat editor for a confidence interval, select
Calculate to display the results. The Draw option is not available.
When you press Í,
Calculate calculates the confidence interval results and displays the outputs on
the home screen.
Bypassing the Inferential Stat Editors
To paste a hypothesis test or confidence interval instruction to the home screen without displaying the
corresponding inferential stat editor, select the instruction you want from the CATALOG menu.
Appendix A describes the input syntax for each hypothesis test and confidence interval instruction.
Note: You can paste a hypothesis test or confidence interval instruction to a command line in a
program. From within the program editor, select the instruction from either the CATALOG (Chapter 15)
or the STAT TESTS menu.
STAT TESTS Menu
STAT TESTS Menu
To display the STAT TESTS menu, press … |. When you select an inferential statistics instruction, the
appropriate inferential stat editor is displayed.
Most
STAT TESTS instructions store some output variables to memory. For a list of these variables, see
the Test and Interval Output Variables table.
EDIT CALC TESTS
1: Z-Test...
Test for 1 m, known s
2: T-Test...
Test for 1 m, unknown s
3: 2-SampZTest...
Test comparing 2 m’s, known s’s
4: 2-SampTTest...
Test comparing 2 m’s, unknown s’s
5: 1-PropZTest...
Test for 1 proportion
6: 2-PropZTest...
Test comparing 2 proportions
7: ZInterval...
Confidence interval for 1 m, known s
8: TInterval...
Confidence interval for 1 m, unknown s
9: 2-SampZInt...
Confidence interval for difference of 2 m’s, known s’s