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Math 119: Elementary Statistics

Math 119: Elementary Statistics. Lecture 01: Course Introduction, Describing Distributions Graphically Jan 2014. Overview. Syllabus MyStatLab Course overview: relevance of statistics Chapter 1: Exploring Data. Math 119 Course Description.

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Math 119: Elementary Statistics

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  1. Math 119: Elementary Statistics Lecture 01: Course Introduction, Describing Distributions Graphically Jan 2014

  2. Overview • Syllabus • MyStatLab • Course overview: relevance of statistics • Chapter 1: Exploring Data

  3. Math 119 Course Description • Exploratory data analysis: graphical and numerical exploration of real data with a heavy dose of common sense. Measures of center (mean, median) and spread (quartiles, variance and standard deviation). • Probability: 3 red, 5 blue, P(blue) = ? • Statistical estimation: the mean IQ is? The next president will be Clinton/Christie with confidence 58%+ 5% • Hypothesis testing: if we’re given a mean IQ for the population (100), how likely is it that after drinking the Kool-Aid, the IQ of the class would shift to 106 • Correlation: Does social distress cause pain? Distress vs pain data

  4. Math 119 • Meeting Times • Lecture: • 2 meetings/week T/Th • 4 meetings/week Mon-Thu • Webpages: • http://swccd.blackboard.com • http://mystatlab.com • http://www.swccd.edu/~bsmith

  5. Contact Info • Instructor: Bruce Smith • Phone: 421-6700, x5291 • e-mail: bsmith@swccd.edu • Office: 320F

  6. Textbook and Materials • Required: • “Elementary Statistics Using theTI-83/84 Plus Calculator, 3rd edition”, by Mario F. Triola • For Homework/Quizzes • mystatlab.com/ • Purchased separately, or packaged together at SWC bookstore • Enrollment in course:

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  8. Other Resources • The Khan Academy is a great reference • Udacity • onlinestatbook.com

  9. Evaluation Policy: “What grade must I get on the final exam to get a A/B/C?” • Semester Grade Evaluation Policy Quizzes (10)50% Midterm exam 15% MyStatLab HW 20% Final Exam 15% Total: 100% grade = 0.50 * avg_q+ 0.15 * midTermExam+ 0.20* hw_avg + 0.15 * final_exam excuse reducer: lowest quiz, lowest hw (based on attendance, see next slides)

  10. Attendance • You can be dropped if you have more than 2 weeks absences • but don’t just stop attending; a failing grade may still be given, not a DR • Lowest quiz and hw scores may be dropped for those with no more than 1 week of absences • if absent for a quiz or exam, these will be your “freebies.” • Student: “My friend is getting married and I have to miss class next week. Can I make up the exam?” • Me: “Enjoy the wedding. If there’s an exam or quiz that you missed, then this will be your freebie. No makeupsallowed.” (unless it’s a college sanctioned event)

  11. DSS • Please see me within the first week of class if there are special needs • Or call DSS at • Voice: (619) 482-6512 • TTY: (619) 482-6740

  12. Class Policies • No food or drink (water bottles OK) • Cell phones silent • No children or visitors without prior permission

  13. Class Policies • “penalty grades” • If you are found cheating or helping someone cheat, you may receive as much as (–)50% of the assignment’s value • Students (both the giver and the receiver) involved in cheating and/or plagiarism will receive a “penalty grade” on the assignment and, at the discretion of the instructor, earn a failing grade in the class. • Also see SWC Course Catalog regarding student conduct.

  14. Elementary Statistics

  15. Course Overview Measures of center and spread Probability Summarizing Data (Histograms, boxplots) Prob Distributions Sample Distributions Central Limit Theorem Inferences, estimation, and confidence intervals Hypothesis tests

  16. Data • observations that have been collected • gender • eye color • voting preference • weight

  17. Statistics • a collection of methods for • planning studies and experiments, obtaining data, and then • organizing, summarizing, presenting, analyzing, interpreting, and drawing conclusions based on the data

  18. Why do you care about these questions? Do angry people have more heart disease? Are students that successfully complete online classes better students in general? Why is it that economically disadvantaged kids perform better academically if pre-school they attended preschool? Does drinking red wine reduce risk of heart attack? Who is likely to win the next election? Will reading stories daily to my child help her become a better learner and a more capable student?

  19. Is the world becoming a better place?

  20. Observing Trends

  21. http://video.ted.com/talks/podcast/HansRosling_2006_480.mp4

  22. Statistical Thinking • Data beat anecdotes • Always look at the data • two B-ball teams, same avg ht • Beware the lurking variable • class A or B spends more time on facebook? • Where the data come from is important • Variation is everywhere • Conclusions are not certain

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