allen analysis

Summary

A Paired Samples T-Test compares two sample means from the same population regarding the same variable at two different times such as during a pre-test and post-test. It can also compare two sample means from different populations whose members have been matched. This would help determine whether the difference between the two means is statistically significant or occurred by chance alone. A paired t-test is used to compare two population means where you have two samples in which observations in one sample can be paired with observations in the other sample. Examples of where this might occur are:

• Before-and-after observations on the same subjects (e.g. students’ diagnostic test results before and after a particular intervention).

• A comparison of two different methods of measurement or two different treatments where the measurements/treatments are applied to the same subjects.