The document provides explanations and examples of key statistical concepts including mean, median, mode, and range. It outlines step-by-step methods for calculating these measures using specific sets of numbers. Definitions and example calculations are presented to illustrate how to find each statistical measure.

2. Vocabulary Review
6 159
The answer to an
addition problem
Sum
The numbers you added t
ogether to get the sum
Addend
+ =

3. Definition
Mean means
average the
average of a
groups of numbers
Example:
2,5,2,1,5
Mean = 3

4. Mean Is Found By Evening Out
The Numbers
2, 5, 2, 1,5

5. Mean Is Found By Evening Out
The Numbers
2, 5, 2, 1,5

6. Mean Is Found By Evening Out
The Numbers
2, 5, 2, 1,5

7. Definition
Mean means
average the
average of a
groups of numbers
Example:
2,5,2,1,5
Mean = 3

8. How to Find the Mean of a Group of Numbers
• Step 1: Add all the numbers.
8, 10, 12, 18, 22, 26,8+10+12+18+22+26

9. • Step 2 – Divide the sum by the number of addends.
8, 10, 12, 18, 22, 26+8+10+12+18+22+26
How many addends are there?

10. • Step 2 – Divide the sum by the number of addends.
# of addends
6)96
16
- 6
36
-36
Sum

11. The mean or average of these numbers is
8, 10, 12, 18, 22, 26

12. What Is The Mean Of
These Numbers?

13. What Is The Mean Of
These Numbers?

14. What Is The Mean Of
These Numbers?

15. What Is The Mean Of
These Numbers?

16. What Is The Mean Of
These Numbers?

17. Definition
Median is a value
separating the higher half fr
om the lower half of a data
sample, a population or a pr
obability distribution.

18. The Middle Number In A Set Of Ordered Numbers.
Example of Median

19. How to Find the Median of a Group of Numbers
• Step 1: arrange numbers from least to greatest.
21,18,24,19,27
18,19,21,24,27

20. How to Find the Median of a Group of Numbers
• Step 2: find the middle number
21,18,24,19,27
18,19,21,24,27

21. How to Find the Median of a Group of Numbers
• Step 2: find the middle number
21,18,24,19,27
18,19,21,24,27
This Is Your
Median Number

22. How to Find the Median of a Group of Numbers
• Step 3: if there are two middle numbers, find the mean of these
two numbers
18,19,21,25,27,28

23. How to Find the Median of a Group of Numbers
• Step 3: if there are two middle numbers, find the mean of these
two numbers
21 + 25 = 46

24. 23 Median
2)46
How to Find the Median of a Group of Numbers
• Step 3: if there are two middle numbers, find the mean of these
two numbers

25. 23 Median
2)46
How to Find the Median of a Group of Numbers
• Step 3: if there are two middle numbers, find the mean of these
two numbers

26. What Is The Median Of
These Numbers?

27. What Is The Median Of
These Numbers?

28. What Is The Median Of
These Numbers?

29. 31, 7, 2, 12, 14, 19
2, 7, 12, 14, 19, 31
12 + 14 = 26 13
What Is The Median Of These Numbers?
2)26
Median

30. 53, 5, 81, 67, 25,78
5, 25, 53, 67, 78,81
53 + 67 = 120 60
What Is The Median Of These Numbers?
2)120
Median

31. Definition
Mode is the number that
appears most frequently in a
set of numbers.
Example:
1,1,3,7,10,13
Mode = 1

32. How to Find the Mode of a Group of Numbers
Step 1: Arrange the numbers in order from least to greatest
21,18,24,19,18
18,18,19,21,24

33. How to Find the Mode of a Group of Numbers
Step 2: Find the number that is repeated the most
21,18,24,19,18
18,18,19,21,24

34. Which number is Mode?

35. Which number is Mode?

36. Definition
Range the difference betw
een the greatest and the leas
t value in a set of numbers.
Example:
1,1,3,7,10,13
Range = 12

37. How to Find the Range of a Group of Numbers
Step 1: Arrange the numbers in order from least to greatest
21,18,24,19,27
18,19,21,24,27

38. How to Find the Range of a Group of Numbers
Step 2: Find the lowest and highest numbers
21,18,24,19,27
18,19,21,24,27

39. How to Find the Range of a Group of Numbers
Step 3: Find the difference between these 2 numbers
18,19,21, 24, 27
27-18 = 9 Range

40. What is the Range ?

41. What is the Range ?

42. What is the Range ?