A conceptual introduction to power and sample size calculations using Stata®

Learn the basic concepts of power and sample size calculations. With definitions for alpha levels, statistical power, and effect size, as well as a brief look at Stata's interface and strategies for increasing statistical power, this video is a useful introduction for all subsequent power and sample size videos on the Stata UA-cam channel.
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[@cait7140]

wow this was like a million light bulbs going off in my head at once as you continued to talk it’s like I felt the puzzle pieces falling into place. It makes so much sense now! Thank you!

[@MattSoave]

Really appreciated the animations of the changing effect size and sample size. Thanks!

[@sarahalkhaifi565]

one of the best vides on understanding basic concept on sample size

[@Carolina-Pia]

Even though I don't use Stata, this was very useful. Thank you!

[@mpiscoya]

A very good explanation! Thanks a lot!

[@PedroRibeiro-zs5go]

Thanks! This video was a great explanation!!!

[@jingzhang7612]

This video is crystal clear. Thank you!

[@marinearoca]

It's crystal clear! Thanks

[@desmondturner5435]

Exactly what I was looking for! Thanks

[@jlegendgamingau]

This really helped me. Thanks!

[@dr024]

very well explanation.. =) This is what i need for my class. =)

[@badboujeee1637]

Thank you!

[@user-ek7cy2lx2t]

Extremely helpful

[@lemyul]

thank you

[@magdymohamed9460]

goooooood

[@alexanderrobinson4810]

awesome

[@inkyukang2358]

according to 1:39, u0 and ua don't seem to be exclusive, but they should've been. Am I getting it wrong?

[@seunghyunchoi496]

interesting

[@vortkes4684]

Can you provide the code for creating these animations/figures?

[@eqisoftcom]

Often, we cannot affect the effect size.