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

1
0-12 Mean, Median, Mode, Range and Quartiles

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

2
Measures of Central Tendency

• Numbers used to represent a set of data

3
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.

4
Find the Measures of Center

• 3, 6, 5, 2, 3, 7

5
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

6
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?

7
5- Number Summary

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

8
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

9
Example- Find the 5 Number Summary

• 8, 7, 5, 19

10
Find the 5 number summary

• 3, 11, 26, 4, 1

11
Class work

• Page P39
• - 9 14 even