Classical Student Test (mean comparison) (AskiaAnalyse)

This test describes the t-test using unpooled variance:

Where

• = Mean 1 observed in the sample
• = Mean 2 observed in the sample
•  = Sample 1 size
•  = Sample 2 size
• = Variance 1
• = Variance 2

We compare the T > tα
 = 1.65
= 1.96
= 2.576; if T >  then there is significative difference.