Lesson 1: Mean, Median, Mode and Range

This week I am taking a test on Data Analysis. I am going to make a series of blog posts covering each of the standard topics that I will be tested on this Friday.

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.
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.
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.
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.
32-20= 12


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