Examlex
In addition to the degree of nonparticipation, nonresponse bias depends on the extent to which nonrespondents differ systematically from respondents in terms of their characteristics on key variables under study.
Normal Population
A population with a distribution that follows the normal (Gaussian) curve, where most measurements are centered around the mean.
Sample Mean
The average value calculated from a sample of data, often used as an estimate of the population mean.
Null Hypothesis
In hypothesis testing, it is the default hypothesis that there is no effect or no difference, and it is subject to test for possible rejection.
Cholesterol Levels
The amount of cholesterol present in the bloodstream, important for assessing heart disease risk.
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