HW Due Thursday + Snow Day Stamps!

**AP FORMS AND FEES ARE DUE NEXT CLASS! GET THOSE IN!**

Snow Day Stamp Opportunity:

• These questions can be found in the "Hypothesis Tests and Conclusions" packet that we worked through (some of) in class yesterday
• Complete (SHOW ALL WORK) the following questions in the packet 
• As you work in your groups on our classwork (next class) I will come around and check your answers; for each correct answer you'll get one stamp (maybe two if you provided a very clear, detailed, organized solution)
• Page 3: "Consider the Second Context"
• Complete the second, third, fourth, and fifth bullets
• Period A only: you can also complete the first bullet, or this whole page, since we didn't get to this in class
• Again, if you do not show work or explain your reasoning you will not earn a stamp
• Back page: "On Your Own"
• Complete the 2 AP MC on the back
• This means you can earn up to 6 extra stamps! I plan to continue to include additional stamp opportunities and intend to have the highest number of stamps required for this quarter--so take advantage of this opportunity!
• Again, if you do not show work or explain your reasoning you will not earn a stamp

Tuesday/Snow Day HW: Counts DOUBLE

Please complete the following in your textbook--this assignment will be checked tomorrow (or the next time I see you) and will be counted double!

Page 470-471: 9, 15, 17, 19, 21, 23

• For #9 your challenge is to find (and correct) as many errors in the work shown as possible! Try to find at least...
• 2 errors in hypotheses
• 2 errors in conditions... (one is missing entirely...)
• 2 errors in the math work for SD and z score....
• Re-write the conclusion (and why is theirs incorrect?)
• For #15 we're back to using a confidence interval to test a hypothesis!
• When doing part b you should write the hypothesis, skip the conditions (they were checked for the interval in a), then use your interval to decide if you "reject the null hypothesis" or "fail to reject the null hypothesis" and explain why
• For #17 we CANNOT do a one prop z test...your task is to explain why
• For 19, 21, 23...
• For each of these we need to conduct a full hypothesis test!
• Hypotheses, Conditions, Math, Conclusion
• **This is direct practice for our quiz later this week--we'll have an open ended problem just like this!
• Use a significance level of 0.05 for each (#19, 21, 23)
• Our textbook does not introduce alpha levels until the next chapter, that's why none are provided here

During our next class we'll continue to practice hypothesis testing; we'll do practice with some AP MC and a free response classwork assignments, working in our groups from yesterday. Then we'll follow that with a chapter 20 vocab quiz and chapter 20 math quiz on Friday!

• If we do not have school tomorrow (Thursday) as well I plan to cancel the chapter 20 math quiz... the schedule would be
• Chapter 20 Vocab Quiz + Start Chapter 21 Friday
• Chapter 21 Monday - Wednesday
• Chapter 19-21 Test Thursday (3/15)
• Chapter 22 Friday (3/16)-Friday (3/23)

Here is the chapter 20 vocab list so you can get a head start studying (some words repeated from our chapter 18/19 quiz):

• Statistical Inference
• Confidence Interval
• Also know the process: Conditions + Name Interval, Math (Interval + Formula), Interpret Interval
• Hypothesis Test
• Also know the process: Hypotheses, Conditions + Name Test, Math (Calc Screen + Z Score formula), Conclusion
• Null Hypothesis
• Alternative Hypothesis
• 10% Condition
• Success/Failure Condition 
• Also know why we check it
• Randomization condition
• Also know why we check it
• Standardized Test Statistic
• P-Value
• Alpha Level/Significance Level
• What conclusion do we draw if our p-value is above our alpha level?
• What conclusion do we draw if our p-value is below our alpha level?
• Standard Error
• Margin of Error
• Critical Value
• Meaning of __% Confidence (Interpret Confidence Level)
• What does the "one" in one proportion z test or one proportion z interval refer to?

And here's an outline of the topics for your "math quiz" (chapter 20, hypothesis testing):

• Conduct a full hypothesis test 
• Hypotheses, Conditions, Math, Conclusion
• This is like #'s 19, 21, or 23 from tonight's homework, or the weekend homework we got a key for on Monday
• Use a confidence interval to test a hypothesis
• Like #15 from tonight's homework
• Write the hypotheses given a context (MC)
• Draw a conclusion given a p-value
• Like today's stamp
• Calculate a p-value given a standardized test statistic (only)
• Discussed today in class
• Know how changing alpha levels will affect our conclusion

Want to learn more about hypothesis testing and confidence intervals, or just want to do some review?

• Watch the AP Stats Guy videos...
• Unit 5
• Hypothesis Testing = videos 6, 10, 11, 12, 13
• Confidence Intervals = videos 6, 7, 8, 9