Statistics 101: To z or to t, That is the Question HD

Statistics 101: To z or to t, That is the Question. In this video we explore the difference between the z- and t-distributions. Many formulas in stats look exactly the same, except one has a z-term and the other has a t-term. Why? We also talk about sampling and sample size since they are related to the t-distribution concept. For my complete video library organized by playlist, please go to my video page here: http://www.youtube.com/user/BCFoltz/videos?flow=list&view=1&live_view=500&sort=dd