Getting Started Mrs. Watkins AP Statistics. Statistics is the study of DATA and VARIATION.

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Presentation transcript:

Getting Started Mrs. Watkins AP Statistics

Statistics is the study of DATA and VARIATION

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

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”

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

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

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

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 ?

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

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