Difference between revisions of "TTest2 Command"
From GeoGebra Manual
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:: "≠" = 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'' = 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. | + | :If ''Pooled'' = false, then population variances are not assumed equal and sample standard deviations are not combined. |
Results are returned in list form as {P value, T test statistic}. | Results are returned in list form as {P value, T test statistic}. |
Revision as of 09:53, 24 July 2011
- 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 list 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 {P 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.