TI-83 Plus Inferential Statistics and Distributions 391
Selecting an Alternative Hypothesis (ƒ < >)
Most of the inferential stat editors for the hypothesis tests prompt you to
select one of three alternative hypotheses.
• The first is a ƒ alternative hypothesis, such as mƒm0 for the Z.Test.
• The second is a < alternative hypothesis, such as m1<m2 for the
2.SampTTest.
• The third is a > alternative hypothesis, such as p1>p2 for the
2.PropZTest.
To select an alternative hypothesis, move the cursor to the appropriate
alternative, and then press Í.
Selecting the Pooled Option
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.