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you would add up all the ages together 12+13+14+16+18+21 = 94

06 July 2011

Mean is the average - add up all the items and divide the total by the number of items e.g. Mean age of a group of people 12, 13, 14, 16, 18, 21

06 July 2011

then divide this total by the number of people in your group (6) so we have 94/6 = 15.67

06 July 2011

To find the Median, place the numbers you are given in value order and find the middle number.
Example: find the Median of {13, 23, 11, 16, 15, 10, 26}.
Put them in order: {10, 11, 13, 15, 16, 23, 26}
The middle number is 15, so the median is 15.

06 July 2011

The median is the number right in the middle

06 July 2011

The mode is the number that occurs the most frequently e.g. find the mode in { 4, 7, 7, 8, 9,9,9,10,11,11} the number that occurs the most is 9 so the mode is 9

06 July 2011

Awesome answers here by Chloe. I just wanted to add that all three are "averages" not just the mean.

08 July 2011

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