13–8 Inferential Statistics and Distributions
8250FC~1.DOC TI-83 international English Bob Fedorisko Revised: 10/26/05 1:39 PM Printed: 10/27/05 2:57
PM Page 8 of 36
Pooled (2.SampTTest and 2.SampTInt only) specifies whether
the variances are to be pooled for the calculation.
• Select
No if you do not want the variances pooled.
Population variances can be unequal.
• 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.
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.
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.
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.
Inferential Stat Editors (continued)
Selecting the
Pooled Option
Selecting
Calculate or
Draw for a
Hypothesis Test
Selecting
Calculate for a
Confidence
Interval
Bypassing the
Inferential Stat
Editors
To Next Page
Loading...
Need help?
General
