In these sections, we're going to look at comparing proportions when the data comes from TWO samples.
This is really important, since in any controlled experiment, you're automatically going to have two groups (at least) and you'll want to see whether there's a significant difference between them, based on whatever your experiment is about!
First, we'll look at how to do a Hypothesis Test for Two Proportions (Section 8.4). Then we'll follow that up with how to construct and interpret a Confidence Interval for Two Proportions (Section 7.5).
Note: I suggest that you go through both sets of notes before doing the 8.4 homework.
Hypothesis Test for Two Proportions (Section 8.4)
Notes and Videos:
Confidence Interval for Two Proportions (Section 7.5)
Notes and Videos: