balancedse

the question

Does arviz_stats compute the balanced-accuracy standard error as a true standard error?

what came out

arviz_stats _acc_balanced returns variance / sqrt(n) instead of sqrt(variance / n), so it is not a standard error. On a symmetric dataset where balanced accuracy equals overall accuracy, the reported .se is five times too small (0.002530 vs 0.012649); the four sibling metrics all take the square root.

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