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Chapter 2
New Terms and Concepts
The following terms were introduced in this chapter. You should be able to define and explain
each term and, where appropriate, describe how each term is related to other terms on the list.
frequency distribution: A tabulation of the number of individuals in each category on the scale of
measurement.
grouped frequency distribution: A frequency distribution where scores are grouped into intervals
rather than listed as individual values.
class interval: A group of scores in a grouped frequency distribution.
upper real limit: The boundary that separates an interval from the next higher interval.
lower real limit: The boundary that separates an interval from the next lower interval.
apparent limits: The score values that appear as the lowest score and the highest score in an
interval.
histogram: A graph showing a bar above each score or interval so that the height of the bar
corresponds to the frequency and width extends to the real limits.
polygon: A graph consisting of a line that connects a series of dots. A dot is placed above each
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This note was uploaded on 04/08/2011 for the course PSY 216 taught by Professor Cynthiaingle during the Spring '11 term at KCTCS.
 Spring '11
 CynthiaIngle
 Psychology

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