{
"test_name": "Rainbow Test (Python - statsmodels)",
"dataset": "faithful",
"formula": "Eruption length (mins) ~ Eruption wait (mins)",
"statistic": 0.9428782335048487,
"p_value": 0.6336313591885188,
"passed": true,
"fraction": 0.5,
"description": "Tests for linearity by comparing fit on central subset vs full data. Uses statsmodels.stats.diagnostic.linear_rainbow."
}