New Unit Tuesday + Weekend HW!

If you were absent yesterday today you must make up your test(s) on Tuesday, Thursday, or Friday of next week. You can do so after school Thursday or during any study hall/lunch any of those days.

• *I am not after school Tues or Fri, so if you have to do the test after school it must be Thursday

I hope you're feeling confident about your test! It was tough (and about 5 minutes too long), but I have confidence you'll improve from our first test.

Either way, here's the good news about AP Stat--new unit Tuesday! And new units in this class mean a fresh start; our next unit deals with scatterplots and association, which gives us all a clean slate with some (mostly) different content.

Homework(s):

1. The Unit 1 Progress Checks (MCQ Part B and FRQ) were intended to be used to study for your test. If you already took the test there is no need to do this. If you did not do the test then you should still look at these.

2. You must complete our next progress check in AP classroom--"Unit 2 Progress Check: MCQ Part A." This is due 

• This progress check will be counted as a classwork or quiz grade--and the grade will be based on your actual # of questions correct, NOT solely on completion
• This progress check gets into some new stuff; the first 9 questions deal with reading graphs and some two way table probability--the probabilities we have discussed
• Starting with question 10 you will start to see questions about scatterplots--this is new stuff for our new unit, so you may have to Google some things or use your textbook:
• Use the information below to help with the "new stuff." 
• Question 9: 
• A positive association means that as one variable increases, the other increases, or as x increases, y increases (graphically think of a positive slope)
• A negative association means that as one variable increases, the other decreases, or as x increases, y decreases (graphically think of a negative slope)
• Question 10:
• For help with describing shape/direction of scatterplots read the "Looking at Scatterplots" section on pages 143 to 144 of your textbook
• Questions 12, 13, and 14:
• All of these deal with understanding correlation
• Read (carefully) through the list of "correlation properties" on p. 152
• To learn more about correlation read the "Correlation" section starting at teh bottom of p. 146 to the step-by-step example on p. 150
• Question 15:
• For this question you need to calculate correlation
• DO NOT find correlation by hand
• Instead, use your graphing calculator!
• Google "how to find correlation on TI___" or "on Casio ___"
• Or, if you have a TI, you can look at the "TI Tips" yellow box on p. 151-152
• Question 16:
• This again deals with interpreting correlation
• It might be helpful to sketch a scatterplot that shows a negative correlation; label your x and y axes with the IV, DV, then use this picture to choose a multiple choice answer
• Question 17: 
• More correlation stuff....
• Back to reading about correlation in the book (see above)

Other than that, have a FANTASTIC four day weekend! Enjoy some time off, but also be sure to get this done! I'll see you on Tuesday for the next unit!