Understanding Alternative Hypotheses in Statistical Testing

In Statistics, when we do Hypothesis Testing, we are supposed to have two hypotheses: A primary, or Null Hypothesis and an Alternative Hypothesis. This StatQuest explains why we need the Alternative Hypothesis, even though Hypothesis Testing tends to focus on the Null.

NOTE: This StatQuest follows up on Hypothesis Testing and the Null Hypothesis: https://youtu.be/0oc49DyA3hU

And if you'd like to learn about p-values, check out...
p-values: What they are and how to interpret them: https://youtu.be/vemZtEM63GY
How to Calculate p-values: https://youtu.be/JQc3yx0-Q9E

Lastly, if you would like to learn about Statistical Tests, see: https://www.youtube.com/playlist?list=PLblh5JKOoLUIzaEkCLIUxQFjPIlapw8nU

For a complete index of all the StatQuest videos, check out:
https://statquest.org/video-index/

If you'd like to support StatQuest, please consider...

Patreon: https://www.patreon.com/statquest
...or...
YouTube Membership: https://www.youtube.com/channel/UCtYLUTtgS3k1Fg4y5tAhLbw/join

...buying one of my books, a study guide, a t-shirt or hoodie, or a song from the StatQuest store...
https://statquest.org/statquest-store/

...or just donating to StatQuest!
https://www.paypal.me/statquest

Lastly, if you want to keep up with me as I research and create new StatQuests, follow me on twitter:
https://twitter.com/joshuastarmer

0:00 Awesome song and introduction
1:49 The Alternative Hypothesis
3:21 Testing the Null vs Alternative for 2 groups
5:38 Testing the Null vs Alternative for 3 or more groups
8:00 Summary and next steps

#StatQuest #AlternativeHypothesis