Question

Refers to the number of subjects or matched pairs with nonzero difference scores.

a) Sample size
b) Variability measure
c) Nonparametric test
d) Effect size

Answer 1

In a hypothesis test for matched or paired samples, subjects are matched in pairs and differences are calculated. The differences are the data. The population mean for the differences, Hd, is then tested using a Student's-t test for a single population mean with n - 1 degrees of freedom, where n is the number of differences.

Step-by-step explanation:

In a hypothesis test for matched or paired samples, subjects are matched in pairs and differences are calculated. The differences are the data. The population mean for the differences, Hd, is then tested using a Student's-t test for a single population mean with n - 1 degrees of freedom, where n is the number of differences.

A hypothesis test for matched or paired samples (t-test) has these characteristics:

1. Test the differences by subtracting one measurement from the other measurement
2. Random variable: x d = mean of the differences