TI-89 / TI-92 Plus / Voyage™ 200 PLT Statistics with List Editor App ˆ Tests Menu 152
2-SampTTest (
continued)
Data and Stats Outputs
Outputs Stored to Description
t t The Student-t value computed for the difference of means.
P Value pval Least probability at which the null hypothesis can be rejected.
df df Degrees of freedom for the t-statistic.
x1, x2 x1_bar
x2_bar
Sample means of the data sequences in List 1 and List 2.
Sx1, Sx2 sx1, sx2 Sample standard deviations of the data sequences in List 1 and List 2.
n1, n2 n1, n2 Size of the samples.
Sxp Sxp The pooled standard deviation. Calculated when Pooled = YES.
Example
1. In the list editor:
list5={12.207,16.869,25.05,22.429,8.456,10.589}
list6={11.074,9.686,12.064,9.351,8.182,6.642}
2. To select 4:2-SampTTest, press:
¦
- ˆ (Tests) 4 for the TI-89
¦ ˆ (Tests) 4 for the TI-92 Plus / Voyage™ 200 PLT
The Choose Input Method dialog box is displayed.
3. If the Data Input Method you want is already displayed, press b to display the
2-Sample T Test input dialog box. If not, press B to display the choices (Data or Stats),
highlight one
, and then press b b to select an input method and display the
2-Sample T Test input dialog box.
4. Enter the arguments into the fields as shown in either the Data or Stats input screen
on the next page.
5. If the Alternate Hyp and Results format that you want are displayed, press b. If
not, press B, highlight your selections, and press b b to view the results.
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