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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

- Minimum
- Lower Quartile- Q1
- Median- Q2
- Upper Quartile- Q3
- Maximum

Definitions of 5-number Summary

- Minimum- Smallest piece of data
- Lower Quartile- Divides the lower half of data

into two equal parts, AKA- Q1 - Median- Separates data into two equal parts- AKA-

Q2 - Upper Quartile- Divides the upper half of data

into two equal parts AKA- Q3 - Maximum- 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
- - 9 14 even