What is Sphericity? Explained Simply (Part 2)

[@MichaelDiamondMusic]

This is the bessst! Even the wiki quote was ambiguous to me until you laid out the formulas .Thanks for that

[@albertolema8583]

Thank you for the explanation. Great work! However, I may be wrong, but when showing the calculation at 2:57, you did not apply the formula as stated: 10.30 + 19.80 - 2(10.28) = 9.54, right?

[@Echowable]

Thatnk you for the video. I really appreciate the clarity of your explanations!

[@suziel1914]

Thank you for this valuable video. Could you please insert the link to your video on sphericity correction?

[@jeanmariekelly4968]

excellent explanation

[@d1m10n]

A fantastic video, as usual. Thank you for the explanation

[@Comisch1]

Still helping - Thanks :)

[@evatsaneva8202]

I would like to ask a question. I still don't get it, and I have read some about covariances, correlation, and the homogeneity assumption..., Why do the groups in the analysis [whether t-test or ANOVA] have to have equal variances? What does this mean in practice? What if they are not equal? Isn't this the aim of the ANOVA analysis (i.e. to find significant differences) ? I really need some help to understand this. I get what is being explained but I don't understand why It is needed and how it translates into practice. Otherwise, thank you very much for the video! It was great :)

[@Statt-rc9xz]

Excellent

[@yetkinutkukamuk4694]

When applying the figures into the formula, the covariances should have been multiplied by 2 as shown in the formula.

[@munozbravoconsultores4736]

Thanks! excellent explanation

[@Rivendial]

Awesome explanation ! =D

[@pulupulumee5631]

Thank you! Very good video!

[@megkemp8725]

Very helpful! Thank you!

[@taylor3543]

Thank you!

[@parisa779]

Thank you, very helpful!

[@khaledElbaji]

Merci beaucoup ! Thank you very much :)

[@how2stats]

Bienvenue : )

[@Sycolog]

Thank you so much!

[@narendeepan]

thanks man

[@cucozy7195]

thank you sir! that was lit shit kid