Examlex
What happens to a river as it flows through a delta and encounters the sea?
Mean
The arithmetic average of a set of numbers, found by dividing the sum of all the numbers by the count of the numbers.
Population Variance
A measure of the dispersion of a set of data points in a population, calculated as the average of the squared deviations from the mean.
Sample Variance
A measure of the dispersion or spread of a set of data points in a sample, illustrating how much the data differ from the mean.
Grouped Data
Data that has been organized into categories, classes, or intervals, often to simplify analysis and find frequency distributions.
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