HackerRank Interview Questions — Statistics and ML

Above is wrong, Entropy is the measure of randomness and not impurity, Gini, misclassification error and likelihood are all measures of impurity

I believe it should be 4 or 2 no chose none of the above

Using the z(99%) = 2.97 and 𝑃(𝑋>12)=0.01, std = 0.3

X = Mean + Z-value ( Standard-deviation)

Mean = X — Z(std) = 12–2.326 * 0.3 = 12 — = 11.30