A sports researcher is interested in estimate if there is relationship between the number of home team and visiting team wins and different sports. A random sample of 526 games is selected and the results are given below. Calculate the chi-square test statistic ?2 to test the claim that the number of home team and visiting team wins is independent of the sport. Use ? = 0.01.
Football basketball soccer baseball
Home wins 39 156 25 83
Visitor wins 31 98 19 75