Examlex
Biological rhythms of wakefulness and sleepiness are controlled by?
Ratio
A quantitative relationship between two numbers, indicating how many times one value is contained or can contain the other.
Sample Variances
A measure of the variance (spread or variability) within a sample data set.
Null Hypothesis
A statement in hypothesis testing that there is no significant difference or effect, serving as the default assumption to be tested against alternative hypotheses.
Population Variances
A measure of the dispersion or spread of a set of data points within a population.
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