Statistical Concepts
Central Tendency
Central tendencies are the statistics used to measure the center of a distribution.
There are three basic measures of central tendency:
Mean, aka "average"
To calculate:
Add up all the numbers in the data set, then divide the total by how many numbers there are in the data set.
Median, always in the middle
To calculate:
Arrange your data in order from least to greatest. For odd numbered datasets the median is the middle number. For even numbered datasets take the middle 2 numbers and divide by 2 to find.
Mode, strength in numbers
To calculate:
Find the value that appears most frequently within your dataset. That number appearing most often is the mode. It is possible to have more than one mode.
