## Wednesday, June 13, 2012

### Measure of Central Tendency

Measures of Central Tendency
-a value that represents the centre of a data set
-can be the mean, median, or mode
-data set is a group of numbers that you must arrange in order from least to greatest.

eg.
2, 3, 4, 5, 6, 5, 4, 5, 3, 4, 5, 6, 7, 5, 3, 4, 3
2, 3, 3, 3, 3, 4, 4, 4, 4, 5, 5, 5, 5, 5,6, 6, 7

Median- the middle number in a set of data after the data have been arranged in order

eg.
median of 2, 5, 6, 8, 9 is 6
median of 1, 3, 6, 8, 9, 10 is 7

Mode- the value that shows up the most
mode and most both have 4 letters

eg.
mode of 3, 5, 7, 7, 9 is 7

Range- positive difference between the largest and smallest values in a data

eg.
Range of - 1, 3, 4, 5, 5, 6, 6, 8, 8, 9
9-1=8

Outlier- a value that is much larger or smaller than the other data value
- the data set may have more than 1 outlier or zero outliers

eg.
outliers for 1, 67, 68, 67, 64, 65, 100, are 1 and 100
outliers for 3, 8, 4, 5, 6, 33, 5, 6 are 3 and 33