Calculate the deviance chi-square goodness-of-fit test by hand for the Cancercells data given in Table 7.3. Expected counts, degrees of freedom, and p-values are found the same way as in the Pearson test. The only difference is in the calculation of the test statistic:
Table 7.3 Cancer cell data classified into groups based on the size of the radius.

Deviance chi-square test statistic = D2 = 2 × ˆ‘[observed count × ln(observed count / expected count)] (7.26)
Describe differences (if any) between your conclusions here and those from the Pearson test in Question 29.

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Median radius Benign MalignantProportion (n) Malignant 115 152 119 2.5 3.5 113 140 85 17 0.017 0.079 0.286 4.5 43 121 212 123 569 6.5 0.984 Total 357