Examlex
The major decline in intellectual function that occurs with aging involves tasks involving speed.
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.
Sign Test
A non-parametric test that assesses the median of a statistical population by comparing the number of positive vs. negative changes from a median value.
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