List of formulas you requested:
- Variance (D):
[
D = \frac{1}{N} \sum_{i=1}^{N} (x_i – \bar{x})^2
]
where (N) is the number of observations, (x_i) is each value, (\bar{x}) is the mean. - Standard deviation (σ):
[
\sigma = \sqrt{D}
]
or
[
\sigma = \sqrt{\frac{1}{N} \sum_{i=1}^{N} (x_i – \bar{x})^2}
] - Coefficient of variation (CV):
[
CV = \frac{\sigma}{\bar{x}} \times 100\%
]
where (\sigma) is the standard deviation, (\bar{x}) is the mean.