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Halo Effect - Problem that arises in data collection due to the tendency to be influenced by a single positive or outstanding trait in forming an overall favorable evaluation.

Halo Error - A type of rating error that occurs when an employee receives the same rating on all dimensions regardless of his or her performance on individual ones.

Histogram - Form of bar chart on which the values of the variable are placed along the X-axis and the absolute frequency or relative frequency of occurrence of the values is indicated along the Y-axis.

Hit Rate - Measure used to assess the results of a discriminant analysis by measuring the proportion of the objects that were correctly classified by the discriminant function(s) in the group to which they actually belong.

Homogeneity - A type of rating error that occurs when a rater gives all employees a similar rating regardless of their individual performances.
Hypothesis Testing - Statistical procedures that allow researchers to use sample data to draw inferences about the population of interest.