assignment3solutions.pdf - Assignment 3 Solutions Include all answers to homework questions in one document and submit it online under Assignment 3

# assignment3solutions.pdf - Assignment 3 Solutions Include...

• Homework Help
• 3

This preview shows page 1 - 3 out of 3 pages.

Assignment 3 Solutions Include all answers to homework questions in one document and submit it online under Assignment 3. Textbook Homework Questions From the OpenIntro textbook (Diez, Barr, and Çetinkaya-Rundel 2015), do the following questions: 2.10, 2.16, 2.22, 2.32, 2.38 . In addition, use R to answer the questions below. 2.10 Guessing on an Exam a) 0 . 75 4 * 0 . 25 = 0 . 079 b) 0 . 25 5 = 0 . 00098 c) 1 - 0 . 75 5 = 0 . 76 2.16 PB & J P ( likes jelly | likes peanut butter ) = P ( likes peanut butter AND likes jelly ) /P ( likes peanut butter ) = 0 . 78 / 0 . 8 = 0 . 975 2.22 Predisposition for Thrombosis We use Bayes’ Rule for this problem. What we know: P ( predisposition ) = 0 . 03 P ( positive | predisposition ) = 0 . 99 P ( negative | no predisposition ) = 0 . 98 So, using Bayes’ Rule: P ( predisposition | positive ) = P ( positive | predisposition ) P ( predisposition ) P ( positive ) = P ( positive | predisposition ) P ( predisposition ) P ( positive AND disposition )+ P ( positive AND no disposition ) = 0 . 99 * 0 . 03 0 . 99 * 0 . 03+0 . 02 * 0 . 97 = 0 . 60 2.32 The birthday problem a) 1 / 365 b) 1 - (364 / 365) * (363 / 365) = 0 . 0082 2.38 Baggage fees a) Bags 0 1 2 Value \$0 \$25 \$35 Probability 0.54 0.34 0.12 1

Subscribe to view the full document.

μ = 0 * 0 . 54 + 0 . 34 * 25 + 0 . 12 * 60 = 15 . 7 σ = (0 - 15 . 7) 2 * 0 . 54 + (25

### What students are saying

• As a current student on this bumpy collegiate pathway, I stumbled upon Course Hero, where I can find study resources for nearly all my courses, get online help from tutors 24/7, and even share my old projects, papers, and lecture notes with other students.

Kiran Temple University Fox School of Business ‘17, Course Hero Intern

• I cannot even describe how much Course Hero helped me this summer. It’s truly become something I can always rely on and help me. In the end, I was not only able to survive summer classes, but I was able to thrive thanks to Course Hero.

Dana University of Pennsylvania ‘17, Course Hero Intern

• The ability to access any university’s resources through Course Hero proved invaluable in my case. I was behind on Tulane coursework and actually used UCLA’s materials to help me move forward and get everything together on time.

Jill Tulane University ‘16, Course Hero Intern

Ask Expert Tutors You can ask 0 bonus questions You can ask 0 questions (0 expire soon) You can ask 0 questions (will expire )
Answers in as fast as 15 minutes