Use the summary of Levene’s test for nonconstant variance given in Figure 12.11 resulting from a single-factor analysis of variance with four treatments to check the constant variance assumption. Is it reasonable to assume that each of the treatment groups has the same variance? Explain.

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Trt 2 3 1 H Test for Equal Variances 10 20 30 40 50 60 70 80 If intervals do not overlap, the corresponding stdevs are significantly different. Levene's Test P-Value 0.023