Examlex
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Normal Distribution
A bell-shaped distribution curve which is symmetric about the mean, showing that data near the mean are more frequent in occurrence than data far from the mean.
Variance
A measure of the dispersion indicating how far individual numbers are from the mean.
Chi-squared Distribution
A statistical tool used to compare observed data with data we would expect to obtain according to a specific hypothesis.
Sample
A subset of individuals or units from a larger population used to estimate characteristics of the whole population.
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