val ols : Measurement.t ‑> resp:Variable.t ‑> preds:Variable.t array ‑> float array Core.Or_error.tval r_square : Measurement.t ‑> resp:Variable.t ‑> preds:Variable.t array ‑> coeffs:float array ‑> floatval bootstrap : trials:int ‑> Measurement.t ‑> resp:Variable.t ‑> preds:Variable.t array ‑> Analysis_result.Ci95.t array Core.Or_error.t