1. Getting Started Mrs. Watkins AP Statistics

2. Statistics is the study of DATA and VARIATION

3. We study statistics: To inform decision- making in science, engineering, government, psychology, sports, education, and LIFE!

4. Who or what do we study? Population: entire collection of subjects about which information is desired “THE WHOLE” Sample: a subset of population which is used to gather information “THE PART”

6. Variables Variable: characteristic of subject Quantitative: numerical Qualitative: categorical

7. Quantitative Variables Two Types : Discrete-- “countable” # of people, # of plants, # of cars Continuous-- “measurable” cost, pulse rate, temperature, weight

8. Where do we get data—many names for sources *Case *Subject *Observational unit *Experimental unit *Respondent *Participant

9. Example: study of teen drivers Population: US Teen drivers Sample: Group of 1000 teenage drivers randomly selected Subject: the teen Variables: age? how many accidents? own car or not ?

10. Who Cares? Important question in statistical research as it frames what we study and why Who cares about teen drivers?