In statistics, we typically use a two-tailed (non-directional) alternative hypothesis. This video illustrated how and when to conduct a test with a one-tailed (directional) alternative hypothesis. This example uses a one-sample t-test, but this same technique will work for every other directional test available in JASP. After illustrating the technique, I discuss the difference in POWER between a one-tail and two-tail test. We will open a CSV dataset in JASP, check the assumptions of the test, conduct the one sample t-test, interpret the findings, and write up the results in APA style.
Download the Friendly, Free, Flexible, Functional JASP software from the official JASP statistics website: https://jasp-stats.org
This video teaches the following commands and techniques in JASP:
Open CSV data in JASP
One-tail, One Sample t-Test
This video uses the dataset Ritalin.csv and JASP version 11.1
Link to a Google Drive folder with all of the files that I use in the videos including spreadsheets, the Bear Handout, and datasets. As I add new files, they will appear here, as well.
https://drive.google.com/drive/folders/1n9aCsq5j4dQ6m_sv62ohDI69aol3rW6Q?usp=sharing
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