{
"test_name": "Rainbow Test (Python - statsmodels)",
"dataset": "ToothGrowth",
"formula": "len ~ supp + dose",
"statistic": 1.0027895853893005,
"p_value": 0.49970256400839624,
"passed": true,
"fraction": 0.5,
"description": "Tests for linearity by comparing fit on central subset vs full data. Uses statsmodels.stats.diagnostic.linear_rainbow."
}