Examlex
Research and experimental expenditures do not include expenditures for ordinary testing of materials for quality control.
Test Statistic
A type of statistic used in hypothesis testing, calculated from sample data, to determine the p-value or test the null hypothesis.
T Value
A statistic that is derived from a t-test and is used to determine if there is a significant difference between the means of two groups.
Degrees of Freedom
The number of independent values or quantities which can be assigned to a statistical distribution or to the calculation of a statistic.
Effect Size
A quantitative measure of the magnitude of the difference between groups or the strength of a relationship between variables.
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