Examlex
Although tea and cocoa have been used for centuries, coffee made its first appearance in the 17th century.
Sample Mean
The average of a set of observations or data points, calculated by summing them all up and dividing by the number of observations.
Degrees Of Freedom
The number of independent values or quantities that can be assigned to a statistical distribution, often determining the shape of the distribution.
Significance Test
A statistical procedure used to determine whether the observed differences between two or more groups are due to chance or to true differences in the samples.
Test Statistic
A value calculated from sample data during a hypothesis test. It is used to decide whether to reject the null hypothesis.
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