stratified random sampling

[@programmingseries436]

Very good explanation! Thank you! How to answer the "old" question of "how many samples in total"?

[@georgioassaker6790]

Thank you for your explanation, do you have any videos related to cluster sampling and two stage sample design, as well?

[@xahidlaala]

Objectively explained. Thanks.

[@babychinx3384]

examples would be more helpful but its fine