Test of significance for comparing means of 2 group is
Paired student t - test ⇒ Comparision of means in paired data of 1 group.
Un - Paired student t - test ⇒ Comparision of means between 2 group.
ANOVA test ⇒ Comparision of means if ≥ 3 groups.
Paired t - test
Unpaired t - test
Sign test
Chi - square test