TTest2 Command

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 {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.