The Use of Notation in Basic Statistics – Part I

Notation in Descriptive Statistics

${{s}^{2}}=\frac{1}{n-1}\left( \sum\limits_{i=1}^{n}{X_{i}^{2}}-\frac{1}{n}{{\left( \sum\limits_{i=1}^{n}{{{X}_{i}}} \right)}^{2}} \right)$

$SS=\sum\limits_{i=1}^{n}{{{\left( {{X}_{i}}-\bar{X} \right)}^{2}}}$
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