Tuesday night's homework is in the book--but these are the same problems that are on the handout I gave you in class! The answers are also posted below.
Page 381-383: 3/11, 5/13, 7, 15, 21
Page 381-383: 3/11, 5/13, 7, 15, 21
- The problems are written as 3/11 b/c #11 asks for the standard deviation of the probability model created in #3 (same for 5/13)
- To find standard deviation we will simply use our calculator (we can also use our calculator to find E(x))
- Check out the yellow box on page 372 to see how to use your calculator to find expected value and standard deviation
- For 3, 5, and 21 the hardest part of the question will likely be calculating the probabilities for our probability model! This requires us to consider all of the skills we learned in chapters 14/15!
- Here are the questions:
- And here are the answers:
- 3a) Amount Won: $0 $5 $10 $30
- Prob 26/52 13/52 12/52 1/52
- 3b) $4.13 won per play (on average)
- 3c) $4ish
- 11) $5.44
- 5a) Children 1 2 3
- Prob 0.50 0.25 0.25
- 5b) 1.75 children per family (on average)
- 5c) 0.87 boys per family (on average) (create a new probability model for the # of boys first)
- 13) 0.83
- 7) $27,000 (on average)
- 15a) 1.7 calls per hour (on average)
- 15b) 0.9
- 21a) # Good Batteries 0 1 2
- Probability 0.067 0.467 0.467
- 21b) 1.40 good batteries (on average)
- 21c) 0.61
Here's the outline of our course through midterm exams in case you're curious...
Tuesday (12/12) = Chapter 15 Quiz (15 min) and Chapter 16 Notes
Wednesday (12/13) to Friday (12/15) = Rest of Chapter 16, Chapter 16 Vocab Quiz and Classwork
Monday (12/18) = Finish chapter 16 and answer probability questions
Tuesday (12/19) = Probability Test: Chapter 14, 15, 16
Wednesday (12/20) to Friday (12/22) = Geometric and Binomial Probability (mini-test Friday 12/22)
Winter Break = "Teaching Yourself Chapter 13--Experimental Design" Project
Tuesday (1/2) to Friday (1/5) = Recapping Experimental Design
Monday (1/8) to Friday (1/12) = Midterm Exam
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