# Blackboard Learn

• 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

# Attendence Expectations

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

# Basic Classroom Manners

• 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.

# Recitation Sections

 10 minutes My talking 25 minutes Worksheet and Discussion 5 minutes Questions time 10 minutes Quiz time 50 minutes Total

# Quizzes

• 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.
• 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.

# Birthdays

• 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%?

# Birthdays Anwser

prob = 1
for (a in 306:364) {
prob = prob * a/365
}
1 - prob
## [1] 0.9941

# Dating

• 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.

# Predictive Analytics

• 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.

# Target Targeted Coupons

• Why supermarkets always say you have to apply for a membership to get discount?
• 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%

# Statistics and Mathematics

• 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.

# Now It Is Your Turn

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