360 PART 7 The Part of Tens

Random fluctuations cause F to exceed the critical F value only 5 percent of the

time. If the F value from your ANOVA exceeds this value, the test is statistically

significant at α = 0.05. For other values of α, df1, and df2, the Microsoft Excel

formula = FINV(α, df1, df2) will give the critical F value.

FIGURE 24-10:

The Fisher F

distribution.

© John Wiley & Sons, Inc.