Video Tutorial – Calculating Expected Counts in Contingency Tables Using Marginal Proportions and Marginal Totals
July 7, 2014 2 Comments
A common task in statistics and biostatistics is performing hypothesis tests of independence between 2 categorical random variables. The data for such tests are best organized in contingency tables, which allow expected counts to be calculated easily. In this video tutorial in my Youtube channel, I demonstrate how to calculate expected counts using marginal proportions and marginal totals. In a later video, I will introduce a second method for calculating expected counts using joint probabilities and marginal probabilities.
In a later tutorial, I will illustrate how to implement the chi-squared test of independence on the same data set in R and SAS – stay tuned!
You can also watch the video below the fold!