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Nonresponse bias.
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In a survey, those who respond may differ from those who do not, in ways that are related to the effect one is trying to measure. for example, a telephone survey of how many hours people work is likely to miss people who are working late, and are therefor
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Nonresponse, английский
In surveys, it is rare that everyone who is ``invited`` to participate (everyone whose phone number is called, everyone who is mailed a questionnaire, everyone an interviewer tries to stop on the street…) in fact responds. the difference between the "invited" sample sought, and that obtained, is the nonresponse.
Nonresponse bias, английский
In a survey, those who respond may differ from those who do not, in ways that are related to the effect one is trying to measure. for example, a telephone survey of how many hours people work is likely to miss people who are working late, and are therefore not at home to answer the phone. when that happens, the survey may suffer from nonresponse bias. nonresponse bias makes the result of a survey differ systematically from the truth.
Nonresponse rate, английский
The fraction of nonresponders in a survey: the number of nonresponders divided by the number of people invited to participate (the number sent questionnaires, the number of interview attempts, etc.) if the nonresponse rate is appreciable, the survey suffer from large nonresponse bias.
Nonresponse rate., английский
The fraction of nonresponders in a survey: the number of nonresponders divided by the number of people invited to participate (the number sent questionnaires, the number of interview attempts, etc.) if the nonresponse rate is appreciable, the survey suffe
Nonresponse., английский
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House edge., английский
In casino games, the expected payoff to the bettor is negative: the house (casino) tends to win money in the long run. the amount of money the house would expect to win for each $1 wagered on a particular bet (such as a bet on "red" in roulette)
Stratified sample., английский
In a stratified sample, subsets of sampling units are selected separately from different strata, rather than from the frame as a whole.
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