Performing a One-way ANOVA in Excel with post-hoc t-tests

[@wardag5370]

I've been struggling with this for ages, thank you so much.

[@DoryVideo]

Glad it helped

[@archaerial131]

Thanks for the simple explanations. I've been trying to figure out how to compare two groups within an ANOVA for a while. I feel dumb not realizing you do a simple t test.

[@riciy]

thank you so much, your calm and clear way of explaining really helped me with my thesis, I never was a very bright user of statistics (more the practical kind of guy) so it helped me big times..Greetings

[@non_ye]

You were extremely helpful with clear explanations. A huge thumbs up to you :)

[@noat5090]

very nice video. but how you assume that groups have equal variances? and please show us how you make group B bar in this graph ?

[@GaryHutsonVBA]

Wouldn't you expect Group B to be significant, as the sample size of Group B is higher than both other groups. Then, you are assuming equal variances although they are not. Group B is twice as high as Group A! Surely, a T test with assuming unequal variance would be the best way to go? Please fill in the gaps please? Thanks

[@doreencalo8736]

Thank you! Your lecture is so much easy to understand. GReatly appreciated.

[@DoryVideo]

My pleasure

[@wangfluenza]

I just passed and exam thanks to you!

[@DoryVideo]

Great job!

[@taymaysie9221]

where tf were you when i was doing my stats paper!!! ur amazing!!!

[@firstname4337]

great video, great explanation -- I could have used this 3 days ago LOL youtube is just now recommending it to me after I spent the last week seraching for stuff like this

[@vinuthaksmysore]

hi what if we have too many groups to do the post test say 50-100 groups?? How to do it then? any other methods

[@adrianegeesaman9157]

Very helpful and straightforward. Thank you for posting!

[@ABunchORandomCrap]

thankyou from 2019 this saved me

[@DoryVideo]

Happy to help

[@yaqubmir]

what when we use two comparisons, do we have to divide 0.05 by two for Bonferroni test. Thanks in advance!

[@brycesoraru9528]

Very helpful! Thank you for the clear explanation.

[@DoryVideo]

My pleasure!

[@personaldevelopment1802]

very Helpful and easy to understand, thankyou Sir

[@drga4977]

Thank you so much for your help>> I have been trying to download SPSS since 3 days and never succeeded... :)

[@drahmedshawkyphd2726]

Thank you for your professional explanation. Can i perform it among 7 different sites? Thanks

[@mouradmadouni8277]

Thank you very much. It's very helpful and clear.

[@DoryVideo]

My pleasure!

[@cemilbayram]

Cannot find "Data Analysis" button under the Data section. Should i download it?

[@DoryVideo]

Yes as the video says you have to enable it first

[@DarkSokiX]

Do you actually have to compare group b with group c if the graph tells you that group a and group b are significantly different, and that group c is smaller than group a? Thank you for the response!

[@mgb2172]

The test is what tells you if the difference is SIGNIFICANT. Seeing it on the graph shows there's a difference, not that the difference is significant

[@anushreesanyal3147]

Crystal clear. Thanks!

[@DoryVideo]

My pleasure!

[@md.masumbillah8222]

nice explanation sir.

[@DoryVideo]

My pleasure. Glad I could be of help to you

[@sparkles9729]

This is helpful, but how do I run the post- hoc tests if I have 5 groups?

[@DoryVideo]

I’m not sure if excel can handle that many groups.

[@Onion176]

Very clear explanation, appreciate it!

[@Buuvei24]

how did you find value 0.0167?

[@nikavorster]

THANK YOU SO MUCH!! Makes so much sense now !

[@Buuvei24]

very helpful explanation. thank you sir

[@DoryVideo]

Happy to help

[@heyitsysaaa]

Thank you for this!

[@DoryVideo]

My pleasure!

[@arc.center9517]

Thank you so much ..It is really very helpful

[@eldalea1158]

Thank you so much! You are a life-saver.

[@greysonnleee]

would u please tell about how 0.0167 comes out?

[@DoryVideo]

Not sure what you mean there, that’s the P value as a result of the ANOVA

[@noha1878]

He divided the significant level (0.05) by the number of comparisons which are 3 in this example.

[@thelazycat_]

Why do you not a F-test to know if the variance is different, and why not paired two samples for means? thank you

[@musomuzo]

If I was going to do a T-test for each one to check if they are significantly different ANYWAY, wouldn't I just skip the ANOVA step? Seems unnecessary..

[@lynnlyfish]

You would increase your chance of error by running a bunch of t-tests.

[@nathaliearbousoff3476]

but the ANOVA is an additional analysis, how doesn't it increase the overall alpha risk?

[@reetobrata]

excellent help. Thanks a lot!

[@shahiruladelie4287]

Can i use one tailed t test

[@DoryVideo]

You CAN do one in excel, of course, just adjust the parameter in the function when performing a t-test; but for data with more then two groups you cannot reasonably use a t-test.

[@nathaliearbousoff3476]

There are actually 4 tests performed if you include the anova. Shouldn't the correction change 0.05 into 0.05/4 instead of 0.05/3? If anyone can help me on this question, thanks

[@ralphanthonyespos9417]

No. He was referring to the number of pair-wise comparisons as the denominator for the Bonferroni correction. In this case, it's 3 (A-B; A-C; B-C). Generally, it's Comb(n, 2) where Comb(n, k) is the combination function for n taken k, and n is the number of elements (groups).

[@AustinRickard]

What kind of post hoc test is this?

[@jncook4312]

Why would you select "t-test assuming equal variances" when the result show that the variances are in fact, unequal?

[@ruzaiq100]

Great video, thanks!

[@DoryVideo]

my pleasure, goad you find it helpful!

[@vasilinakapetanaki6839]

Thank you very much!!

[@glendaedwards5006]

Thanks so much for this well detail video, definitely using now to do my final year project

[@DoryVideo]

My pleasure

[@AlejandroIllustratorCC]

wow! thank you so much!

[@toastyminimallows]

Thank you!

[@kar2194]

Great video thank you. Could anyone help me please... ? I am confused when to use Equal variance or Unequal Variance during selecting the t-test

[@DariusDevlin001]

Fantastic! Thanks

[@DoryVideo]

My pleasure. Please subscribe as I’m adding more videos all the time

[@alanalo983]

thanks so much!!!

[@r.paramadina5532]

Thanks~

[@DoryVideo]

You’re welcome!

[@abrarbio1828]

Thank you :)

[@danielelacaita5307]

I love you

[@DoryVideo]

Why thank you!

[@JesusRodriguez-zx3em]

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[@azadehtajmirriahi3872]

Thank you so much!

[@trangdo6229]

thank you so much!

[@DoryVideo]

My pleasure!