Variance is a statistical parameter that analyzes the spread, or distribution, of data. Calculating variance quickly requires a statistics calculator like the TI-84 graphing calculator. The TI-84 calculator has a statistics module that lets you automatically calculate the most common statistical parameters from a list of statistical data you enter. These parameters include the mean, the standard deviation, the mode and others. Because the variance is defined as the standard deviation raised to the power of 2, you can use your TI-84 to calculate the variance from the standard deviation that the TI-84 computes.

# How to Calculate Variance From a Ti84

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