On their TV show, Chicago film critics Gene Siskel and Roger Ebert portrayed themselves as adversarial, with quite different opinions. During a two-year period, the counts of (positive, mixed, negative) Ebert reviews were (64, 9, 10) for positive Siskel reviews, (11, 13, 8) for mixed Siskel reviews, and (13, 8, 24) for negative Siskel reviews.10 Use models and kappa to summarize their agreement.