This week we will cover the last two formulas on the Interactive Formula Sheet. They let us do hypothesis tests to find out if there is a significant difference between two different population proportions and to make a confidence interval for how big the gap is.

**Goal.** To introduce the two-sample hypothesis test for proportions.

**Step 1.**This is chapter 23 in the book. As always, it is a good idea to read the textbook!**Step 2.**These notes are a quick outline chapter 23: Two sample inference for proportions**Step 3.**Try this workshop: Drug testing**Step 4.**Here is a video with my solutions and explanation: YouTube**Step 5.**I've posted the homework for this week. You should try to solve all of the problems by Friday. On Friday, I'll post a form where you can submit some of your solutions online.

**Goal.** To use the two-sample confidence interval for proportions.

**Step 1.**Try this workshop: Climate change opinions**Step 2.**Here is a video with my solutions: YouTube

I'll be available at 11am and 1pm for Zoom office hours. Let me know if you are interested and I'll send you a link to the Zoom meeting.

**Goal.** Turn in the homework for week 12 and use today for catch up and review.

**Step 1.**Here is the link to turn in this week's homework: GoogleForm**Step 2.**Here is a list of suggested review problems for Midterm 3 next week: Midterm 3 review. Also, here is the formula sheet that will be included with midterm 3: Midterm 3 formula sheet

If I have time, I'll try to post some additional review problems over the weekend that don't require the textbook.