Happy Thanksgiving!

First and foremost, happy Thanksgiving break! Enjoy your few days--rest up, relax, spend some quality time with friends and family, and recharge those academic batteries! When we come back we'll have 3 weeks (and a few more days) to power through the rest of probability!

Over break, please complete the following for homework:

• Venn Diagram practice problems!
• Remember, we can use Venn diagrams to model probability problems if we have an overlap, or "both" events occur--that's the key word that tells us we can use a Venn diagram!
• Also, remember if you are asked for "or," this includes "both"--for example, if I have to find the probability a person lives on campus or as a meal plan (1a), I do include the probability that someone has both...
• Use "Step by Step" example on page 347 for more help! Read the explanations on the left, they are likely more helpful than the formulas on the right!
• Or, google some "probability and Venn diagrams" for some more help!

• Normal Model/Probability AP Problem!
• The first part (a) is some Normal model review! Use last week's homework, the AP Stats guy, or your chapter 6 notes to help with this!
• For the second part (b), you have to use your answer from a to find an "at least one" probability, just like we saw on Tuesday's quiz!
• For part (c) you are asked to find a mean...here's some help...
• Use invnorm( to find the Z SCORE that has 99% of the data to the left of it (think about what you'll have to enter for the mean and standard deviation if you want a z-score!)
• Now, set up the z score formula...
• Substitute the value of the z-score with 99% of data below it, substitute your x-value (291.2), and then substitute the standard deviation--now solve for "x-bar!"

If you were out or lost the problems you can find them below. Be sure to have these done! I'm not sure if I'll check these each as a homework (each would count as it's own HW assignment), or collect and grade them--we'll see!

Finally, here's Monday night's textbook homework if you want to get a head start:

Page 362: 1, 5, 7, 19

• For 1, to define sample space you need to list all possible outcomes!
• For 19, use your "words" to write out each scenario--just remember, in this problem, when we take out a battery we have to adjust our fractions! This is done without replacement!