What exactly is a mosaic plot?
it is a plot just like Bob just described with the ambulance + helicopter death rates !!
A mosaic plot is basically a segmented bar chart, but it accounts for how much of the data is for each variable (a larger n value for one of the variables) by the width of the bar.
Keep in mind that it’s (in our opinion) very unlikely to show up on this year’s exam. We just wanted to show it to cover all bases. Don’t sweat it too much