AP Stats Key Words Peliminary Chapter
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Created by:
ChrissyMin on September 6, 2011
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13 terms
Terms | Definitions |
|---|---|
 statistics | science of learning from data |
| statistic inference | trying to draw conclusions about a large group and use properly designed experiments, sample surveys, and other observational studies to draw conclusions that go beyond the data themselves |
| available data | produced in the past for some other purrpose but may help answer a present question |
| survey | gauge public opinion |
| observational study | sample survey; observe individuals and measure variables of interest but do not attempt to influence the response |
| experiment | do stuff to people, provide useful data only when properly designed |
| probability | chance behavior while not predictable in the short run but in the long run, allows us to decide whether an oberved outcome is too unlikely to be due to chance variation |
| individuals | objects described by a set of data |
| variables | any characteristic of an invdividual |
| categorical variable | individual into one of the several groups of categories |
| quantitative variable | a variable taking a numerical value upon which arithmetic operations can be done |
| data analysis | transforming data with the aim of extracting useful information and facilitating conclusions |
| distribution | a variable's dist says what values the variable takes and how often it takes them |
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