Creating cross tabs for categorical variables

If your data includes 2 categorical variables, the most common test for…that association is going to be the Chi Squared test for Independence.…Also just sometimes called Crosstabs.…We're going to be doing the Chi Squared…test for Crosstabs with categorical variables, here.…Let me use a dataset that is NR about the Titanic.…You can call it up right here, it's about survival of passengers on the Titanic.…And it's based on the class, first, second, third class or…crew, sex, age, and whether they survived or not.…

We can get the structure by seeing that it's a table with 4 dimensions.…You want to see the actual table itself, we can just type in Titanic.…And there you have it.…You can also convert this to what's called a flat table.…We are not going to be using that but this is what a flat table looks like.…Its a much more condensed approach.…But for doing analyses, we're going to have to convert…the table to a data frame worth one row per observation.…We talked about this in a separate movie.…It's a rather long line of code.…