# In the data set, what is the variance? 6, 8, 1, 9, 4

**Solution:**

__Variance__ is a statistical measurement that is used to determine the spread of numbers in a data set with respect to the average value or the __mean__.

The standard deviation squared will give us the variance**.**

Here, ‘X’ represents the observations and ‘n’ represents the number of observations.

Here, n = 5

X | 6 | 8 | 1 | 9 | 7 | ΣX = 28 |

X² | 36 | 64 | 1 | 81 | 16 | ΣX² = 198 |

Variance = {(ΣX²/n ) - (Σx / n )²} = (198/5) - (28/5)²

= (990 - 784)/25 = 8.24

## In the data set, what is the variance? 6, 8, 1, 9, 4

**Summary:**

The variance of the given data 6 8 1 9 4 is 8.24

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