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. Definition the sum of the data divided by the total number of elements
Mean (average)
the sum of the data divided by the total number of elements

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

6. What is the mean 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
What is the sum of the numbers?
102
How many numbers are there? 16
What is the sum divided by the number of elements?
6.375

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 mean number of letters in the first names of the students in our class?3 6 7 8 6 5 5 6 7 5 2 6 6 5 4 5
What is the sum of the numbers? 84
How many numbers are there? 16
What is the sum divided by the number of elements?
5.25

9. How many people live in your house?
Example
How many people live in your house?
Taj
Amber
Winfre
Azzure
Darius
Jawann
Anthony
Kennedi
Kelly
Courtney
Nadia
Keon
Tyrone JT
Duane
Peter

10. What is the mean number of people who live in our houses?
What is the sum of the numbers?
How many numbers are there? 16
What is the sum divided by the number of elements?

11. Example US Representatives per State for the Original 13 Colonies
New Jersey 12
Connecticut 5
New York 27
Delaware 1
North Carolina 13
Georgia 14
Pennsylvania 18
Rhode Island 2
South Carolina 7
Maryland 8
Vermont
Massachusetts 9
Virginia 11

12. 128 13 9.8 What is the sum of the numbers? How many numbers are there?
What is the mean number of representatives of the original 13 colonies? 12 5 27 1 13 14 18 2 7 8 9 11
128
What is the sum of the numbers?
How many numbers are there? 13
What is the sum divided by the number of elements?
9.8

13. Example Eastern Conference NBA wins as of 4-12 Cavaliers 57 Raptors 54
Hawks 48
Heat 47
Celtics
Hornets
Pacers 43
Pistons
Bulls 41
Wizards 40
Magic 35
Bucks 33
Knicks 32
Nets 21
76ers 10

14. What is the mean number of wins?57 54 48 47 43 41 40 35 33 32 21 10
598
What is the sum of the numbers?
How many numbers are there? 15
What is the sum divided by the number of elements?
39.9