0-12 Mean, Median, Mode, Range and Quartiles

Objective: Calculate the measures of central tendency of a set of data.

Measures of Central Tendency

Numbers used to represent a set of data

Measures of Center

Mean: The sum of the numbers in a set of data divided by the number of items

Median: The middle number in a set when arranged in numerical order

Mode: The number that appears most often in a set of data

RANGE: The difference between the greatest and the least data values.

Find the Measures of Center

3, 6, 5, 2, 3, 7

You Try- Find the Measures of Center.

1) 33, 38, 29, 25, 41, 40

2) 74, 78, 79, 80, 78, 72, 81, 83, 76, 78, 76, 75, 77, 79, 72

P38, # 20

On her first five history tests, Yoko received the following scores: 82, 96, 92, 83, and 91. What test score must Yoko earn on the sixth test so that her average (mean) for all six tests is 90?

5- Number Summary

MinimumLower Quartile- Q1Median- Q2Upper Quartile- Q3Maximum

Definitions of 5-number Summary

Minimum- Smallest piece of dataLower Quartile- Divides the lower half of

data into two equal parts, AKA- Q1Median- Separates data into two equal

parts- AKA- Q2Upper Quartile- Divides the upper half of

data into two equal parts AKA- Q3Maximum- Largest piece of data

Example- Find the 5 Number Summary

8, 7, 5, 19

Find the 5 number summary

3, 11, 26, 4, 1

Class work

Page P39

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