Monday, November 10, 2008

Two-sample t-test

In this tutorial, we show how to use TANAGRA to determine if two populations means are equal. The conditional variance may be assumed as equal or unequal i.e. we use pooled or separate variance estimation.

Keywords: test for mean comparison, Student's t-test
Components: T-Test, T-Test Unequal Variance
Tutorial: en_Tanagra_Two_Sample_T_Test_For_Equal_Means.pdf
Dataset: auto83b.xls
Reference: NIST/SEMATECH, « e-Handbook of Statistical Methods », Section 7.3.1 « Do two processes have the same mean ? ».