Lesson 1: Calculating Mean, Median, Mode and Range.

In this lesson we will be using the numbers from this example:

20, 22, 22, 26, 27, 29, 32

To find the mean in a data set, add all of the numbers and then divide the total by amount of numbers that are in the data set.

Example:

20+22+22+26+27+29+32= 178

178/8= 22.25

To find the median in a data set, simply cross out one number at a time on each side.

Example:

__20, 22, 22__, 26,

__27, 29, 32__

The median in this data set is 26.

To find the mode of a data set, identify which number is used the most.

Example:

In this data set 22 is the mode because it is used twice, and all the other numbers are only used once.

To find the range in a data set, subtract the maximum from the minimum.

Example:

32-20= 12

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