# What are the mean, median, mode, variance and standard deviation of {4,6,7,5,9,4,3,4}?

##### 1 Answer

Mean

Population: Variance

Sample:

#### Explanation:

**Mean** is the arithmetic average of the data values

**Median** is the middle value when the data values have been sorted (or the average of the 2 middle values if there are an even number of data values).

**Mode** is the data value(s) the occur with the greatest frequency.

**Variance** and **Standard Deviation** depend upon whether the data is assumed to be the entire **population** or only a **sample** from the entire population.

**Population Variance**

is the sum of the squares of the differences between each data value and the mean, divided by the number of data values.

**Population Standard Deviation**

is the square root of

**Sample Variance**

is the sum of the squares of the differences between each data value and the mean, divided by **one less than** the number of data values.

**Sample Standard Deviation**

is the square root of