Unbiased Statistic
An unbiased statistic is a sample estimate of a population parameter whose sampling distribution has a mean that is equal to the parameter being estimated. Some traditional statistics are unbiased estimates of their corresponding parameters, and some are not. The simplest case of an unbiased statistic is the sample mean. Under the usual assumptions of population normality and simple random sampling, the sample mean is itself normally distributed with a mean equal to the population mean (and with a standard deviation equal to the population standard deviation divided by the square root of the sample size). A sample proportion is also an unbiased estimate of a population proportion. That is not surprising, as a proportion is a special kind of mean where all of the ...
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Reader's Guide
Ethical Issues In Survey Research
Measurement - Interviewer
Measurement - Mode
Measurement - Questionnaire
Measurement - Respondent
Measurement - Miscellaneous
Nonresponse - Item-Level
Nonresponse - Outcome Codes And Rates
Nonresponse - Unit-Level
Operations - General
Operations - In-Person Surveys
Operations - Interviewer-Administered Surveys
Operations - Mall Surveys
Operations - Telephone Surveys
Political And Election Polling
Public Opinion
Sampling, Coverage, And Weighting
Survey Industry
Survey Statistics
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