Today I am going to introduce t-test for two samples.
t-test is a statistical hypothesis test to compare two group.
t-test uses a mean and standard deviation of sample data to determine whether the population means of two group have a relation or not.
Actually, there is an another test which is ANOVA (analysis of variance) has a same purpose. Usually t-test is much more simple than ANOVA test.
This test might be applied in many cases. Such as following
case1) Income gab between city and urban.
case2) New medicine test for patient
