How'd you do?

Did you get an A on the test today?

Tonight, please complete the chapter 22 reading quiz using your textbook. This will be your first quiz grade of the 4th quarter, so get a 100%! This is actually due on Friday, but you'll have some book problems to do tomorrow....so I'd recommend you do it tonight! If you lost your paper or were absent, the questions are below.

One other thing...Cynthia sent me an email about a Khan Academy app you can download. I'm sure many of you have used this site before, but the app might make life a little easier. It has some tutorial videos you can use to start reviewing for the AP Stat exam, or you can use it for other math classes (and in college!). Search your app store and download it (for free)! The link to the website is below, and under our resources on the right.

https://www.khanacademy.org/

Here's the reading quiz...

Chapter 22 Reading Quiz:

Use your textbook to answer each of the questions below as you read the chapter. Be sure your answers are thorough! The more you work on this, the better prepared you’ll be as we (quickly) move through this chapter!

1.)    In addition to the three conditions we must check—for each of our two samples—there is one assumption we must make –the independent groups assumption (page 497).

a.       What is this assumption?

b.      Why is this assumption important?

2.)    In this chapter, we will begin to explore a two-proportion z-interval. What is the formula for a two-proportion z-interval?

3.)    Just below the heading “Everyone into the Pool,” the first sentence states that our hypothesis (test) is about a new parameter. What is this parameter?

4.)    Define pooling.

5.)    How do we find “p-hat, pooled?” Write the formula below, or describe how it is calculated.

6.)    List the four conditions we must check for a two proportion z-test (or interval). (If you can’t find them, take a look at the “Step-by-Step” examples!)

7.)    Examine the “two-proportion z-test” box on page 502.

a.       Why do we have to use a pooled p-hat?

b.      What is the formula for the z-score that we will use?

8.)    What are the three bolded, “What Can Go Wrong?” statements on page 505?

9.)    Use the glossary on page 506 to define “two-proportion z-interval.”

10.) At the bottom of page 506 there is a summary that shows the skills that we should know.

a.       Record the three skills listed under the “think” heading.

b.      What two skills are listed under “show?”

c.       What four skills are listed under “tell?”