Mean Median Mode Range

Central Tendency Definitions

• Mean: The arithmetic average used by adding all numbers and dividing by the count.
• Median: The middle number when the list is sorted. If there is an even number of values, it is the average of the two middle numbers.
• Mode: The number(s) that appear most frequently. A set can have one mode, multiple modes, or no mode.
• Range: The difference between the largest and smallest value.

Example

Set: {2, 5, 9, 3, 5, 4}

Sorted: {2, 3, 4, 5, 5, 9}

• Mean = 28 / 6 = 4.66
• Median = (4+5)/2 = 4.5
• Mode = 5