t_test_two_samples.pl $inputFile1 $inputFile2 $inputTestSidedness3 $inputStandardDeviationEquality4 $outputFile1
.. class:: infomark
**What it does**
This program implements the non-pooled t-test for two samples where the alternative hypothesis is two-sided or one-sided. The program takes four inputs:
- The first input file is a TABULAR format file representing the first sample and consisting of one column only.
- The second input file is a TABULAR format file representing the first sample and consisting of one column only.
- The third input is the sidedness of the t-test: either two-sided or, one-sided with m1 less than m2 or, one-sided with m1 greater than m2.
- The fourth input is the equality status of the standard deviations of both populations.
- The output file is a TXT file representing the result of the two-sample t-test.
**Example**
Let us have the first input file representing the first sample as follows::
5
4
8
6
7
2
1
1
0
6
4
5
7
5
3
2
5
8
7
6
4
And the second input file representing the second sample as follows::
2
3
5
1
2
7
5
4
3
2
7
6
0
8
4
6
9
2
4
5
6
Runnig the program and choosing "Two-sided" and "Equal" as parameters will give the following output::
Two Sample t-test
data: sample1 and sample2
t = -0.3247, df = 40, p-value = 0.7471
alternative hypothesis: true difference in means is not equal to 0
95 percent confidence interval:
-1.720030 1.243839
sample estimates:
mean of x mean of y
4.333333 4.571429