1.32 Refer to quadratic form (1.18) that leads to the Pearson chi-squared.

a. Verify that the matrix quoted in the text for ¹ is the inverse of 20.

b. Show that (1.18) simplifies to Pearson's statistic (1.16).

2

c. For the zs statistic (1.11), show that z X2 for c = 2.

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