Difference between revisions of "TTest2 Command"
From GeoGebra Manual
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:If ''Pooled'' = false, then population variances are not assumed equal and sample standard deviations are not combined. | :If ''Pooled'' = false, then population variances are not assumed equal and sample standard deviations are not combined. | ||
| − | Results are returned in list form as { | + | Results are returned in list form as {Probabilty value, T test statistic}. |
;TTest2[<Sample Mean 1 >,<Sample Standard Deviation 1>, <Sample Size 1>, <Sample Mean 2 >,<Sample Standard Deviation 2 >, <Sample Size 2>, <Tail>,<Boolean Pooled>] | ;TTest2[<Sample Mean 1 >,<Sample Standard Deviation 1>, <Sample Size 1>, <Sample Mean 2 >,<Sample Standard Deviation 2 >, <Sample Size 2>, <Tail>,<Boolean Pooled>] | ||
:Performs a T test of the difference between two population means using the given sample statistics. ''Tail'' and ''Pooled'' are defined as above. | :Performs a T test of the difference between two population means using the given sample statistics. ''Tail'' and ''Pooled'' are defined as above. | ||
Revision as of 14:16, 16 August 2012
- TTest2[<List of Sample Data 1>,<List of Sample Data 2>,<Tail>,<Boolean Pooled>]
- Performs a T test of the difference between two population means using the given lists of sample data. Tail has possible values "<", ">" , "≠" that determine the following alternative hypotheses:
- "<" = difference in population means < 0
- ">" = difference in population means > 0
- "≠" = difference in population means ≠ 0
- If Pooled = true, then population variances are assumed equal and sample standard deviations are combined in calculation.
- If Pooled = false, then population variances are not assumed equal and sample standard deviations are not combined.
Results are returned in list form as {Probabilty value, T test statistic}.
- TTest2[<Sample Mean 1 >,<Sample Standard Deviation 1>, <Sample Size 1>, <Sample Mean 2 >,<Sample Standard Deviation 2 >, <Sample Size 2>, <Tail>,<Boolean Pooled>]
- Performs a T test of the difference between two population means using the given sample statistics. Tail and Pooled are defined as above.
