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A hard constraint
Interval
A range between two numbers or points, often used to specify a period of time or a statistical range.
Standard Normal Distribution
A specific probability distribution that is symmetric about the mean, showing that data near the mean are more frequent in occurrence than data far from the mean.
Z-score
A metric that depicts how far a certain value stands from the mean of a collection of values, using the unit of standard deviations for measurement.
First Quartile
The value below which 25% of the data falls, marking the lower quarter of a data set.
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