APEX AP Stats Lesson 1.3.1 Study: Populations and Samples, Parameters and Statistics Studyguide
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10 Terms
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Population
entire group we are interested in
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Population Size (N)
the total number of individuals in a population
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Sample
smaller group from the population; only some members involved
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Sample Size (n)
the total number of individuals in a sample
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Parameter
numerical fact about a population
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Statistic
numerical fact about a sample
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Simple Random Sample (SRS)
every possible combo of population members in size n have an equal chance of being chosen
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Haphazard Sampling
aka convenience sampling; using whoever is available, not random and doesn't meet the requirements of an SRS
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Known statistics/parameters
use roman letters
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Unknown statistics/parameters
use greek letters
Note 
Flashcards (25)