A paired t-test is used when two measurements have been made of the same subjects, and we want to know whether there is a significant difference between these measurements on average. For example, subjects could be measured before and after a treatment, in an attempt to determine whether the treatment produces an improvement.
After selecting Paired t-test from the menu, simply enter the sample values for each individual. Biostats Calculator will calculate the difference between measurements and perform a hypothesis test to determine whether it is statistically significant.
Biostats Calculator reports: