# Psychology 2810 Chapter Notes - Chapter 6: Frequency Distribution, Normal Distribution, Cumulative Frequency Analysis

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Published on 7 Feb 2013

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Chapter 6

TABULAR AND GRAPHICAL DESCRIPTION OF DATA

empirical data- analysis and summarization of data in ways that make it possible to see

the patterns that exist in them. Includes presenting data in tables, graphs, and numerical

summaries.

table- a display of data in a matrix format

graph - a representation of data by spatial relationships in a diagram

x-axis: independent variable

y-axis: dependent variable

Frequency Tables

-in this table rows indicate possible scores on test, page 143

Frequency Distributions

-a graph that shows the number of scores that fall into specific buns, or divisions of the

variable

histogram- a frequency distribution in which the frequencies are represented by contigu-

ous bars

frequency polygon- a frequency distribution in which the frequencies are connected by

straight lines

normal curve- a bell shaped curve described by a certain mathematical function

skewed- a distribution that is not symmetrical

Cumulative Frequency Distributions

-a frequency distribution indicates the number of cases at each score

cumulative frequency distribution- a frequency distribution that shows the number of

scores that fall at or below a certain score