Measures of Central Tendency & Range

Central tendency is defined as “the statistical measure that identifies a single value as representative of an entire distribution.” MeanMedian

Mean. The average. (1) Add all the numbers (2) Divide the sum by the amount of numbers given.


Mean = 800/5 = 160

Median.  Order the numbers, and then find the middle. If 2 numbers are in the middle add and divide by 2.

Mode. The number that occurs most frequently  (Repeat the most)

Range. Subtract the largest minus the smallest.    (Max   – Min)

Range = 168-155 = 13

Outlier A value far from most others in a set of data






PR01      Mean_Median_Mode 1

PR06      Mean_Median_Mode 2

PR02      Mean 1

PR03      Mean 2

PR04      Median 1

PR05      Median 2

PR07      Mode

PR08      Range


STATISTICS Vocabulary,  



Bar Graph. A graph that is used to compare quantities.  The height or length of each bar represents a given number.