Question
State properties of binomial distribution.
✓
Answer
1. It is a discrete probability distribution.
2. Parameters are n and p.
3. Mean is np.
4. Variance is npq, and standard deviation is $\sqrt{npq}$.
5. Variance is always less than mean (npq < np).
6. It is symmetric if $p = 0.5$, positively skewed if $p < 0.5$, and negatively skewed if $p > 0.5$.
2. Parameters are n and p.
3. Mean is np.
4. Variance is npq, and standard deviation is $\sqrt{npq}$.
5. Variance is always less than mean (npq < np).
6. It is symmetric if $p = 0.5$, positively skewed if $p < 0.5$, and negatively skewed if $p > 0.5$.
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