1. Measures of Central Tendency
Mean, Median, Mode, Range

2. Vocabulary Hey Diddle, Diddle, the median’s the middle
You add and divide for the mean
The mode is the one, that you see the most
And the range is the difference between

3. Mean – average Median – middle Mode – most Range – difference
Vocabulary
Mean – average Median – middle Mode – most Range – difference

4. the middle number in a sorted list of data
Definition
Median (middle)
the middle number in a sorted list of data

5. How long is your last name?
Example
How long is your last name?
Benton 6
Grayson 7
McWilliams 10 6
Brooks
Harris 6
Poquiz 6
Cottman 7
Henson 6
Simms 5
Debnam 6
Jackson 7 5
Smith 7
Dillard
Mack 4
Tilghman 8
Ebuwei 6 4
Gage

6. What is the median number of letters in the last names of the students in our class?6 6 7 6 7 6 7 6 6 7 4 10 6 5 5 8 4
Put the numbers in order from smallest to largest 4 4 5 5 6 6 6 6 6 6 6 7 7 7 7 8 10
Choose the number that is in the middle
The median is 6

7. How long is your first name?
Example
How long is your first name?
Taj 3
Amber 5
Winfre 6 6
Azzure
Darius 6
Jawann 6
Anthony 7
Kennedi 7
Kelly 5
Courtney 8
Nadia 5 4
Keon 6
Tyrone JT 2
Duane 5
Peter 5

8. What is the median number of letters in the last names of the students in our class?3 6 7 8 6 5 5 6 7 5 2 6 6 5 4 5
Put the numbers in order from smallest to largest 2 3 4 5 5 5 5 5 6 6 6 6 6 7 7 8
Choose the number that is in the middle
When there is an even number of numbers, the median is the average of the 2 middle numbers is 6
The median is (5 + 6)÷2 = 5.5

9. Example American League MLB wins 2014 Baltimore NY Yankees Toronto96
NY Yankees 84
Toronto 83
Tampa Bay 77
Boston 71
Detroit 90
Kansas City 89
Cleveland 85
Chicago 73
Minnesota 70
Los Angeles 98
Oakland 88
Seattle 87
Houston
Texas 67

10. What is the median of the wins?
First put the numbers in order 96 84 83 77 71 90 89 85 73 70 98 88 87 67
What is the middle number? 84

11. Age of Disney Channel Actors23 23 23 20 14
Bridgit Mendler
Miley Cyrus
Selena Gomez
Ross Lynch
Rowen Blanchard 30 19 28 23 23
Raven Symone
Hillary Duff
Cole Sprouse
Zendaya
Demi Lovato

12. What is the median of the ages?
First put the numbers in order
14, 19, 20, 23, 23, 23, 23, 23, 28, 30
What is the middle number, or average of 2 middle numbers? 23

13. Top 15 shows in adults 18-49 for March 28-April 3, 2016
Net
18-49 Rating
ACM AWARDS
CBS
2.3
AMERICAN IDOL
FOX
2.1
CHICAGO FIRE
NBC
1.7
CHICAGO MED
1.8
CRIMINAL MINDS
DANCING WITH THE STARS
ABC
EMPIRE
4.8
GREY’S ANATOMY
2.2
LIFE IN PIECES – F
LITTLE BIG SHOTS
SCANDAL
SURVIVOR 2
THE BIG BANG THEORY
3.5
THE VOICE – MONDAY
2.8
THE VOICE – TUESDAY
2.4

14. What is the median of the ratings?
First put the numbers in order
What is the middle number, or average of 2 middle numbers?
2.0