The level of certainty that the true score falls within a specific range. The smaller the range the less the certainty.
An area that is approximately central within some larger region
A statistical relation between two or more variables such that systematic changes in the value of one variable are accompanied by systematic changes in the other
A set of intervals, usually adjacent and of equal width, into which the range of a statistical distribution is divided, each associated with a frequency indicating the number of measurements in that interval.