If n = 10 and p = 0.70,then the standard deviation of the binomial distribution is
A) 14.29.
B) 1.45.
C) 7.00.
D) 0.07.

Question

Quizplus · Accepted Answer

The standard deviation of a binomial distribution is calculated using the formula $\sigma = \sqrt{n \cdot p \cdot (1-p)}$, where $n$ is the number of trials and $p$ is the probability of success on a single trial. Substituting $n = 10$ and $p = 0.70$, we get $\sigma = \sqrt{10 \cdot 0.70 \cdot (1-0.70)} = \sqrt{10 \cdot 0.70 \cdot 0.30} = \sqrt{2.1} \approx 1.45$.

If N = 10 and P = 0