Math — Descriptive Statistics
Centre, spread and the interquartile range.
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\bar{x} = \frac{\sum x_i}{n}
\sigma = \sqrt{\frac{\sum(x_i - \bar{x})^2}{n}}
IQR = Q_3 - Q_1
z = \frac{x - \mu}{\sigma}
Centre, spread and the interquartile range.
\bar{x} = \frac{\sum x_i}{n}
\sigma = \sqrt{\frac{\sum(x_i - \bar{x})^2}{n}}
IQR = Q_3 - Q_1
z = \frac{x - \mu}{\sigma}