Examlex
Historically,prevailing social attitudes have always exerted some influence on IQ testing practices and the interpretation of IQ test results.
Z-test
A statistical test used to determine if there is a significant difference between sample and population means, assuming the population variance is known.
Chi-squared Test
The Chi-squared test is a statistical method used to determine if there is a significant difference between the expected and observed frequencies in one or more categories.
Test Statistic
A quantity derived from sample data used to make a decision about a hypothesis test.
Z
'Z' often represents the Z-score in statistics, which is the number of standard deviations a data point is from the mean of the data set.
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