273 pt 3. [16] Independent t-test

independent sample t-test

an _______ _____ t-test allows you to test the difference between TWO distributions that have no shared correlation

n-2

what are the DOF of an independent sample t-test

independent t

example: are there differences in sprint performance between diet group A and group B? - what test is performed?

there is no difference in sprint performance between group A and B

example: are there differences in sprint performance between diet group A and group B? — what is the null?

we fail to reject the null hypothesis. sprint performance is not different between sprint groups

example: are there differences in sprint performance between diet group A and group B? - t(98) = -1.28, p = 0.204 — what conclusion can be made?

the data are normally distributed.

what is the null hypothesis of the shapiro wilks test?

> 0.05

what value would you look for in the shapiro wilks test p to fail to reject (the data are normally distributed)

> 0.05

what value would you look for in the levene’s test to fail to reject the null?

the variances between the two groups are equal

what is the null hypothesis of the levene test?