
133Analyses of Multiple Independent Samples
large effect size, indicating a strong association between the median
number of books sold back and discipline. Figure5.9 shows results of
the follow-up test.
The comparison between literature and philosophy also produced a
signicant chi-square result [χ
2
(1, N = 30) = 11.63, p < 0.01]. The phi and
Cramer’s V statistics (0.62) show a large effect size. The comparison
between history and philosophy yielded a non-signicant chi-square sta-
tistic [χ
2
(1, N = 30) = 3.33, p = 0.07]. Results for the literature and philosophy
comparison and the history and philosophy comparison are not displayed.
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