Difference between revisions of "TTest2 Command"

From GeoGebra Manual
Jump to: navigation, search
m (parameter formatting)
Line 7: Line 7:
 
:: "≠" = 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 10:53, 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.
© 2021 International GeoGebra Institute