Thursday, September 30, 2010

Mode, Median, and Outliers

Helpful Homework Hints

1st step to solve any question having to do with median, mode, and outliers - Put the numbers in order from least to greatest

Mode- This is the number that you see most often

Median - This is the number in the middle of the set (after you put the numbers in order from least to greatest)

Outlier - To find this number you need to, subtract the first two numbers, and subtract the last two numbers. Out of those two differences, the difference that is the greatest will be the outlier.


Example:
10, 2, 21, 56, 10, 80, 85

Step 1 - Put in order from least to greatest
2, 10, 10, 21, 56, 80, 85

Step 2 - Find the mode (number you see most often)
2, 10, 10, 21, 56, 80, 85

Step 3 - Find the median (number in the middle)
2, 10, 10, 21, 56, 80, 85

Step 4 - Find the outlier
2, 10, 10, 21, 56, 80, 85
10 - 2 = 8 85 - 80 = 5
Since 8 is greater than 5, the outlier will be the smallest number 2
Note: if the differences are the same, there is no outlier

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