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AP Statistics Study Cards Flashcards

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5838972158ParameterA calculation made from population data0
5838972159StatisticA calculation made from sample data1
5838972160Convenience SampleUses subjects that are readily available (no randomization)2
5838972161Voluntary Response SampleSubjects choose to be part of the sample (no randomization)3
5838972162Simple Random SampleEvery member of the population is equally likely to be chosen.4
5838972163Steps to taking an SRS1. Assign each individual a number 2. Use table/calculator to choose sample (ignore repeats) 3. Indicate when to stop using the RNG 4. Identify subjects that correspond w/ selected #'s5
5838972164Stratified Random SamplePopulation is divided into groups and an SRS is selected from each group. Groups are different from one another. (some of all)6
5838972165Cluster SamplePopulation is divided into groups and an SRS of entire groups is selected. Groups are similar to one another. (all of some)7
5838972166Systematic Random SampleEvery kth member of the population is chosen8
5838972167Under-coverage BiasA group within the population is left out of the sampling frame9
5838972168Non-Response BiasPerson(s) chosen for the survey do not respond10
5838972169Response BiasSelected individuals respond incorrectly or untruthfully11
5838972170Statistics (the subject)The science (and art) of learning from data12
5838972171IndividualsThe objects described by a set of data. Individuals may be people, but they may also be animals or things.13
5838972172VariableAny characteristic of an individual14
5838972173Quantitative VariablesVariables that count or measure (numeric)15
5838972174Categorical VariablesVariables based on labels or categories (qualitative)16
5838972175Distribution of a variableGives the values of a variable and their frequency.17
5838972176Observational StudyWatching/observing individuals and recording variables of interest.18
5838972177ExperimentIndividuals are randomly assigned to groups where some treatment is imposed to determine cause and effect.19
5838972178PopulationThe entire group of individuals we are interested in20
5838972179SampleA subset of the population21
5838972180SamplingSurveying, experimenting on, or observing a portion of the population.22
5838972181CensusSurveying, experimenting on, or observing the entire population23
5838972182Sampling ErrorAny differences between what the sample says and what is actually true about the population. Cannot be entirely eliminated.24
5838972183Table of Random DigitsA long string of the digits 0, 1, 2, 3, 4, 5, 6, 7, 8, 925
5838972184BiasWhen the design of the sample systematically favors certain outcomes.26
5838972185Wording of questionsCauses response bias by making the questions leading or confusing. Most important influence on the answers given to a survey.27
5838972186StrataGroups of individuals in a population which are similar with respect to the variable of interest.28

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