**Lecture Sections**- Ellen Gundlach
- Email: gundlach@purdue.edu
- Office Hours: Thursdays 12:00 - 1:00 at HAAS 115
**Recitation Sections**- Wutao(Julius) Wei
- Email: wutao@purdue.edu
- Office Hours: Fridays 11:30 - 12:20 at HAAS 115
- Course Website: http://www.stat.purdue.edu/wei73/courses/stat113/coursepage.html

- You need to get to
**Blackboard Learn**: http://mycourses.purdue.edu to finish some part of your requirement of the course - You will find
*Syllabus*,*Help Sessions*,*Online Lectures*,*Mixable Discussion*,*StatsPortal*,*Perdisco* - You have a
**Syllabus Quiz**due by Friday 1/18 at 11:59 pm

Exam 1 | 20% |

Exam 2 | 20% |

Final Exam | 20% |

Perdisco | 15% |

Recitation Quizzes | 12% |

Mixable Discussion | 8% |

Class Participation | 5% |

Total | 100% |

- 90-80-70-60 grading scale for A,B,C,D cut-offs
- +/- grades will be given at instructors's discretion
- No curve

- We expect you to attend every recitation and lecture class.
- If you cannot meet the expectations, switch to the online version of the course.

- No technology except iClickers and calculators will be allowed in classes. No Laptops, phones, iPods, tablets, etc.
- You can only hold one iClickers.
- No private conversations unless discussion times.
- To come late or leave early is not permitted.

10 minutes | My talking |

25 minutes | Worksheet and Discussion |

5 minutes | Questions time |

10 minutes | Quiz time |

50 minutes | Total |

- On most of Mondays, you will have a quiz in recitation.
- You will have your first quiz next week.
- It will last 10 minutes and can be given at the beginning, middle, or end of class. The total is 20 points.
- Your lowest quiz grade will be dropped.
- You are allowed to bring a inches cheat sheet with anything you want written on both sides of it. No photocopying, faxing, printing or using friends' cheat sheets, etc. You will turn it in with your quiz and it worth 1 point out of 20.
- Any needed tables (e.g., Normal) will be provided for you, but no formula sheet will be given.

- I teach 3 recitaion sections and there are 60 students in total. What's the probability that two students share the same birthday(MM/DD)?
- 20%?
- 40%?
- 60%?
- 80%?
- Over 99%?

```
prob = 1
for (a in 306:364) {
prob = prob * a/365
}
1 - prob
```

`## [1] 0.9941`

- Suppose you have a sequence of 10 companies to date with. After your first date, you have to decide whether to continue relationship or just break up with him/her. What is the strategy to find best company with the highest probability?

- Drop the first 3. Then if the next is better than the first 3, accept him/her. Or just reject and try next one.

- You will often buy something together when you are in supermarkets. Like cereals and milk, chips and salsa, turkey and stuffing, etc.
- Supermarkets will put these kind of stuffs together so that the sale of both items will rise.
- After some statistical analysis for customers' receipt, researchers find that there is a high probability that people buy
*diapers*and*beer*together.

- Why supermarkets always say you have to apply for a membership to get discount?
- Do you ever notice that the Ads by the side of your web browser are related to something you have visited before?
- Target uses a smart phone app to analyze users and send targeted coupons to the users.
- The usage of coupons average is 9% but targeted raise up to 24%

- Math: a counter example makes theories wrong; Stat: NO
- Math: you have to know why for each step; Stat: Not always
- Math: theory is the most important stuff; Stat: Data is
- You
**DO NOT**need much math background(high school level's algebra is enough) to learn this course well.

- Introduce yourself
- Name
- Major
- Interests
- Course expectation
- Any concerns?