Statistics 101: ANOVA Post Hoc Test (Fisher's LSD)

In this Statistics 101 video, we explore the basics of post hoc analysis in ANOVA. While this video uses Fisher's LSD as an example, there are others such as Tukey HSD, Scheffe's Method, and Bonferroni that have similar aims. Post hoc analysis can be controversial but this is simply an introduction to the topic using an example problem. Enjoy!
My playlist table of contents, Video Companion Guide PDF documents, and file downloads can be found on my website: www.bcfoltz.com
#statistics #regression #machinelearning #datascience

[@michaelgeorgemcdonald5927]

Can't wait to use ANOVA and Test on some data I'm tracking. Thanks for the videos. They're great! Very well presented and concise. Well done to you and thanks again!

[@scottsara123]

I love your video, whenever i need clarity about statistical inference i follow you. Thanks.

[@JiancarloUlloa]

Thank you for this video, and to present the information so clearly!!

[@eldrigeampong8573]

You are the best Brandon. Your videos are excellent and you make statistics very easy to grasp. Keep it up

[@VenkataSubramaniRamachandra]

As usual a very neat and clear presentation. Thanks a lot.

[@juliesampson162]

thanks for the aside about the coasters. the wooden ones have an extra "scare" factor. giant dipper in santa cruz is one of those, but the King is over a mile?!? I love it. Thanks for these videos. you rock.

[@teresarogers2353]

Thanks! You make this easier to understand

[@Muuip]

Great presentation, very helpful. Much appreciated.

[@aiikaiik]

Incredibly Informative!!! Thanks Brandon, I subscribed.

[@faraesthetics7161]

I love your video. Really help me in my test! Thank you

[@ChalaMosisa1bestsong]

your videos helps a lot

[@Mina-xo6ii]

I love your videos, they helped me alott! will you please make one about PLS (partial least squares regression)

[@luciehronova1584]

Thank you very much for your videos! :)

[@michaelodonnell7844]

A brilliant video like all your other videos. Thanks very much. One question. In this video, you compared the groups pairwise to identify which differences between the groups was significant. But what about the Type 1 error multiplicative effect for 3 groups. Why is this not a factor here?

[@ElimelchRT]

very good explained!

[@sylviaemejuru1956]

Thank you very much. You are the best!

[@ahmadabul4883]

I highly recommend watching this tutorial

[@alejandrocrates]

thanks ever so much man

[@heshammohamed2524]

Excellent work.....
please Foltz what can I do if my data is non-normally distributed? what is the best method can I use instead of two-way ANOVA.

[@joyousmomentscollection]

I love King's Island.. :) I have been there too.. 45 min drive from where I used to live .. lol

[@liranzaidman1610]

I love these videos

[@vaishnavisingh7175]

Thanks Brandon!

[@MS-xb8pd]

8:51 when I put the same table in excel and run one way ANOVA: Single Factor, it gave me different results. I am facing problems with these statistical techniques when I perform them in excel. Please help me

[@tracykakyoalexis2155]

Thank you 😊

[@Dupamine]

But where does this formula come from what's the theory behind it ?

[@Magmatic91]

I find it hard to understand the part with error compounding. I mean, I know that in probability if two events are independent and have let's say a probability of 0.05 of happening (In our case Type One Error). Then if we want to repeat the experiment let's say 3 times, then we set P(Error) = 0.05 and then we have 0.05 ^3 = 0.0125%. So at the end we decreased our P(E) by repeating the experiment 3 times. I'm I getting something wrong here, can your please help me understand this concept? Thanks.

[@cococnk388]

Morning sir,
Which Post Hoc Test can we use for a TWO WAY ANOVA? W/O replication
thanks.

[@jamaerdersin]

I hace tree samples for tomatoes in differents mature states. Can I use LSD ?

[@tonmoydas3520]

Sir, please make tutorials for other post hoc analysis methods.

[@selousscout9664]

please explain when the 0.5 significance level is compounded, and when not. I see you doing t tests comparing each one individually in this video. Please help

[@brunog.campos3236]

4:24 what if the 3º value is not relevant for the comparison between 1 and 2, in addition to be completely independent from the 2º value? And the variance of these 3º value is masking the difference between 1 and 2?

[@karannchew2534]

9:20 13:42 How is MSE Mean Square Error calculated?

[@jemiyardenglem6160]

Thanks

[@MrOndra31]

At 7:57 point three: shouldn't it be "sample pair" instead of "population pair"?

[@prateek2159]

In case of Beast VS Banshee we compared p-value with 0.05 but in case of Beast VS DiamondBack we compared it with 0.001, why ?

[@dioakbar708]

could anyone told me how to do LSD in two factor anova without replication??

[@BobTheZealot]

9:18 "The alternative hypothesis that they are all not equal" should be "The alternative hypothesis that they are not all equal"

[@karannchew2534]

"Fisher’s LSD, which is the F test, followed by ordinary t-tests among all pairs of means, but only if the F-test rejects the null hypothesis. The F-test provides the overall protection against rejecting H0 when it is true."