You are working with the text-only light edition of "H.Lohninger: Teach/Me Data Analysis, Springer-Verlag, Berlin-New York-Tokyo, 1999. ISBN 3-540-14743-8". Click here for further information.
| You are working with the text-only light edition of "H.Lohninger: Teach/Me Data Analysis, Springer-Verlag, Berlin-New York-Tokyo, 1999. ISBN 3-540-14743-8". Click here for further information.
|
Table of Contents  Statistical Tests Means Two-Sample t-Test Large Sample Size |
|
| See also: small sample size, distribution calculator, survey on statistical tests |   |
We define a new variable: the difference,
and 
of the two samples. The mean of this variable d is 
.
Its standard deviation is given by:
which is also called the standard error. For large samples (n1,
n2) the distribution of the differences d is approximately normal.
So we can apply the same methods as for the one-sample
t-test for large samples, but now using the new variable d.
Last Update: 2005-Jul-16