Introduction to Statistics for the Social Sciences SBS
Introduction to Statistics for the Social Sciences SBS 200, COMM 200, GEOG 200, PA 200, POL 200, or SOC 200 Lecture Section 001, Fall 2015 Room 150 Harvill Building 10: 00 - 10: 50 Mondays, Wednesdays & Fridays. http: //courses. eller. arizona. edu/mgmt/delaney/d 15 s_database_weekone_screenshot. xlsx
Exam 1 – This past Friday It went really well! Thanks for your patience and cooperation We should have the grades up by Friday (takes about a week)
Everyone will want to be enrolled in one of the lab sessions Labs continue this week, Project 1
By the end of lecture today 9/28/15 Overview of Project 2 What are the main objectives in completing research in any area?
. Example of a study Who is taller men or Gender Independent Height Variable? Dependen t IV: Nominal women? DV: Nominal Ordinal Variable? This is an example of a _____. a. correlation t-test b. t-test c. one-way ANOVA d. two-way ANOVA Ratio Ordinal Interval. IV: or Interval or Ratio? Discrete Ratio? DV: Continuous or discrete?
. Example of t-test Directional? Non(predicting directional who is taller? ) Who is taller men or women? Between Or within? Quasior True? How would you state no difference between groups? This is called the “null hypothesis” No difference in the height between men and women
. Example of a study Are people with curly hair or straight hair more “dateable” This is an example of a _____. a. correlation t-test b. t-test c. one-way ANOVA d. two-way ANOVA Curly vs Independent Dateability straight hair Dependen Variable? t IV: Nominal DV: Nominal Ordinal Variable? Ratio Ordinal Interval. IV: or Interval or Ratio? Discrete Ratio? DV: Continuous or discrete?
. Example of a study Directional? Non(is it predicting directional who is more dateable? Are people with curly hair or straight hair more “dateable” Between Or within? How would you state no difference between groups? No difference in the dateability of people with straight versus curly hair This is called the “null hypothesis”
Think about how you might Create example of t-test Identify single IV (two levels) Identify DV (must be numeric) Graph should have two bars (one for each mean) Study Type 2: t-test Comparin g Two Means? Use a ttest t-test: Curly vs Straight hair
Writing Assignment Worksheet Distributed in Class Designing t-tests
Writing Assignment Please watch this video describing a series of t-tests What is the independent variable? How many different dependent variables did they use? (They would conduct a different t-test for every dependent variable) http: //www. everydayresearchmethods. com/2011/09/curly-or-straight-. html http: //abcnews. go. com/Video/player. Index? id=5563289 http: //www. youtube. com/watch? v=z 7 kfi. A 2 SXMY http: //www. youtube. com/watch? v=n 4 WQh. JHGQB 4
More information on registering clickers coming soon
Schedule of readings Before next exam (October 16 th) Please read chapters 1 - 8 in Open. Stax textbook Please read Chapters 10, 11, 12 and 14 in Plous Chapter 10: The Representativeness Heuristic Chapter 11: The Availability Heuristic Chapter 12: Probability and Risk Chapter 14: The Perception of Randomness
Why do we concern ourselves about research? – Five objectives 1. To explore potential phenomena • explore whether phenomenon is present • explore a phenomenon with a fresh take • generate new ideas and discover relationships. e. g. business socks – how might you market this? e. g. dubstep – what is it – how might we reach out to this community?
Why do we concern ourselves about research? – Five objectives 1. To explore potential phenomena • explore whether phenomenon is present • explore a phenomenon with a fresh take • generate new ideas and discover relationships e. g. business socks – how might you market this? e. g. dubstep – what is it – how might we reach out to this community? Yo, you wanna meet up, have a seizure whilst listening to the noise of a wampwampwampwampwamp until your ears bleed
Why do we concern ourselves about research in business? – Five objectives 2. To describe phenomena • build a vocabulary of constructs and make distinctions between similar constructs • (how is dubstep different from techno or house? ) • cluster similar characteristics into related constructs. - Types of management style - Strategies for quality control
Why do we concern ourselves about research in business? – Five objectives 3. To explain and model phenomena • explanation: find cause and effect relationships • propose mechanisms that determine outcomes • show and why a phenomenon operates as it does
Why do we concern ourselves about research in business? – Five objectives 4. To predict future behavior • what characteristics are likely to result in worker productivity, consumer behavior, etc. . . • explanations can help with predictions, but being able to predict an outcome doesn’t necessarily provide a good explanation
Why do we concern ourselves about research in business? – Five objectives 5. To influence behavior • how can we use what we know about human behavior to affect how people around us react and behave (and do what we want) – increase number of volunteers – supervisors increasing probability of happy employees – parent increasing probability of child taking out the trash – to advance better practices
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