{
"test_name": "Rainbow Test (Python - statsmodels)",
"dataset": "prostate",
"formula": "lcavol ~ lweight + age + lbph + svi + lcp + gleason + pgg45 + lpsa",
"statistic": 0.9483448533158089,
"p_value": 0.5735685839700878,
"passed": true,
"fraction": 0.5,
"description": "Tests for linearity by comparing fit on central subset vs full data. Uses statsmodels.stats.diagnostic.linear_rainbow."
}