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Properties of the Distribution
of the Chi-Square Statistic – cont.
2. The values of chi-square can be zero or positive, but they
cannot be negative.
3. The chi-square distribution is different for each number of
degrees of freedom, which is df = n – 1. As the number of
degrees of freedom increases, the chi-square distribution
approaches a normal distribution.
In Table A-4, each critical value of 2 corresponds to an
area given in the top row of the table, and that area
represents the cumulative area located to the right of the
critical value.
Copyright © 2010, 2007, 2004 Pearson Education, Inc. All Rights Reserved.
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