Significance test for the difference of the sample averages

Significance test for the difference of the sample averages and joining of the samples

Sample 1 average	Sample 1 std. deviation	Sample 1 size
Sample 2 average	Sample 2 std. deviation	Sample 2 size
Average of joint samples	Size of joint samples
Standard deviation of joint samples	Test value t for average difference

Statistical sources:

[1]Interactive statistical calculation pages [Java, JavaScript]. Calculators, plotters, random number generators for mathematicians and statisticians. [2]Hyperstat Online Textbook