Validity, Bias, & Confounding

[@yetesfan]

Excellent teacher with a beautiful voice!

[@hussamm9605]

Excellent teacher! Thank you!

[@Elixir01.k]

Awesome explanation,recommend to all

[@plttji2615]

Thank you for the video, can you help me how to prove that is unbiased in this question? Question: Compare the average height of employees in Google with the average height in the United States, do you think it is an unbiased estimate? If not, how to prove it is not matched?

[@various.3519]

Are you ready for a ride ?