In short, Statistics is associated with collecting, classifying, arranging and presenting numerical data. It allows us to interpret various results from it and forecast many possibilities. Statistics deals with facts, observations and information which are in the form of numeric data only. With the help of statistics, we are able to find various measures of central tendencies and the deviation of different values from the center.

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Calculate Statistics | Calculating T Test Statistic |

Chi Square Statistic Calculator | F Test Statistic |

The important statistics formulas are listed in the chart below:

Additional guidelines on all statistics formula are given below. See the below list where all statistical formulas are listed.

Mean | $\bar{x}=\frac{\sum x}{n}$ | x = Items given n = Total number of items |

Median | If n is odd, then M = $(\frac{n+1}{2})$$^{th}$ term If n is even, then M = $\frac{(\frac{n}{2})^{th}term+(\frac{n}{2}+1)^{th}term}{2}$ | n = Total number of items |

Mode | The value which occurs most frequently | |

Variance | $\sigma ^{2}$ = $\frac{\sum (x-\bar{x})^{2}}{n}$ | x = Items given $\bar{x}$ = Mean n = Total number of items |

Standard Deviation | $S\ =\ \sigma \ =\ \sqrt{\frac{\sum (x-\bar{x})^{2}}{n}}$ | x = Items given $\bar{x}$ = Mean n = Total number of items |