Glossary
B
Bernoulli
The Bernoulli distribution takes values of 0 and 1. A Bernoulli variate takes the value
of 1 with probability equal to the specified probability parameter.
P
practical significance
A statistical test will answer the question, "Is there a difference between two
groups?" but not the follow-up "Is that difference large enough for me to care?" It is up to you to
determine whether test results are useful to your situation.
S
Sensitivity
A measure of the usefulness of a classification scheme. Sensitivity is the probability
that a "positive" case is correctly classified, and is plotted on the y-axis in an ROC curve.
1-sensitivity is the false negative rate.
Specificity
A measure of the usefulness of a classification scheme. Specificity is the probability
that a "negative" case is correctly classified. 1-specificity is the false positive rate, and is
plotted on the x-axis in an ROC Curve.