Examlex
What is the importance of item difficulty and how is it calculated?
Numerical Index
A quantitative measure or indicator that represents statistical data points or trends.
Curvilinear Relationship
A type of relationship between two variables where the change in one variable has a non-linear effect on the other variable, often visualized as a curved graph.
Correlation Matrix
A table showing correlation coefficients among more than two variables.
Scatterplot
A type of graph used to display values for two variables for a set of data, showing the relationship between them.
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