30Multiple Proportions: Goodness of Fit
Rather than eyeballing a histogram or a continuous probability distribution, let's look at the 
Table 30.1 that tells us the 
value that corresponds to various 
-values and various degrees of freedom. Our 
value of 6.67 with two degrees of freedom corresponds to a 
-value between 0.05 and 0.025. (A statistics calculator gives us the more precise 
-value of 0.0356.) Notice that if there were three degrees of freedom, then the 
-value would be between 0.10 and 0.05. These 
-values mirror what we determined earlier with the simulation histograms.
Table 30.1 Chi-squared table.
| -Value | ||||||||||
| 0.25 | 0.20 | 0.15 | 0.10 | 0.05 | 0.025 | 0.02 | 0.01 | 0.005 | 0.0025 | 0.001 ... |
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