Chapter 11

(10 in 2nd Can. Ed.)

Hypothesis Testing Using the

Chi Square (χ2) Distribution

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Outline:

•The basic logic of Chi Square.

•The terminology used with bivariate tables.

•The computation of Chi Square with an

example problem using the Five Step Model

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Basic Logic

•Chi Square is a test of significance based on bivariate

tables.

•We are looking for significant differences between

the actual cell frequencies in a table (fo) and those

that would be expected by random chance (fe).

•The data are often presented in a table format. If

starting with raw data on two variables, a bivariate

table must be created first.

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Bivariate Tables:

•Must have a title.

•Cells are intersections of columns and rows.

•Subtotals are called marginals.

•N is reported at the intersection of row and

column marginals.

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University:
Shree Ram Swarup College of Engineering & Management

Subject:
Statistics for Psychologists

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05/01/2013