Statistics practice

A mean is not a risk. A binomial is not a fault tree.

Deterministic practice for descriptive mean and P(X = k) on independent Bernoulli trials. Blank inputs are not zero.

Sample mean

Values

mean 5.000

sample s 2.582

Mean is sum ÷ n. Sample s uses n−1. Neither is a rate, a TWA or a control decision.

Binomial P(X = k)

Trials n (1–20)Successes kP(success) on one trial

0.4096

C(n,k) p^k (1−p)^(n−k). Independent identical trials only. Do not use this for a common-cause pair.