Adler Summary

TEST STATISTIC: 2-

INDEPENDENT T-TEST

Use when you want to compare two

sample means to each other (no

population parameters are necessary) and

when the selection of one person is in no

way dependent on selection of another

person. Two sample means, one

explanatory and one response variable.

Null: There is no difference between

sample 1 mean and sample 2 mean.

Alternative: There is a difference between

sample 1mean and sample 2 mean.

Critical Values can be found using a t

Critical Value chart. p-values can be

found using statistical software.

 Degrees of freedom (DF) = n1 + n2 - 2