Paired t-Test | Paired sample t-test
Whatisthepairedt-test?Thepairedt-testisamethodusedtotestwhetherthemeandifferencebetweenpairsofmeasurementsiszeroornot.WhencanIusethetest?Youcanusethetestwhenyourdatavaluesarepairedmeasurements.Forexample,youmighthavebefore-and-aftermeasurementsforagroupofpeople.Also,thedistributionofdifferencesbetweenthepairedmeasurementsshouldbenormallydistributed.Whataresomeothernamesforthepairedt-test?Thepairedt-testisalsoknownasthedependentsamplest-test,thepaired-differencet-test,thematchedpairst-testand...
What is the paired t-test?The paired t-test is a method used to test whether the mean difference between pairs of measurements is zero or not.
When can I use the test?You can use the test when your data values are paired measurements. For example, you might have before-and-after measurements for a group of people. Also, the distribution of differences between the paired measurements should be normally distributed.
What are some other names for the paired t-test?The paired t-test is also known as the dependent samples t-test, the paired-difference t-test, the matched pairs t-test and the repeated-samples t-test.
What if my data isn’t nearly normally distributed?If your sample sizes are very small, you might not be able to test for normality. You might need to rely on your understanding of the data. Or, you can perform a nonparametric test that doesn’t assume normality.
Using the paired t-testThe sections below discuss what is needed to per...