RANK OBSERVED EXPECTED (O-E)^2/E SUM

r<=29 211 211.4 0.001 0.001
r=30 5051 5134.0 1.342 1.343
r=31 23184 23103.0 0.284 1.627
r=32 11554 11551.5 0.001 1.627

chi-square = 1.627 with df = 3; p-value = 0.653241