meanmedianmodebbambaassignmentfor allsemester.pptx

Mean, Median, Mode
& Range
By Mr. Clutter
VMS Library
2007-2008

Copyright © 2000 by Monica Yuskaitis
Vocabulary Review
• Sum – the answer to an
addition problem.
• Addend – the numbers you
added together to get the
sum.
6 + 9 = 15

Definition
Mean
Means
Average

Definition
• Mean – the average of a
group of numbers.
2, 5, 2, 1, 5
Mean = 3

Mean is found by evening
out the numbers
2, 5, 2, 1, 5

Mean is found by evening
out the numbers
2, 5, 2, 1, 5
mean = 3

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 = 96

Group of Numbers
• Step 2 – Divide the sum by
the number of addends.
8, 10, 12, 18, 22, 26
8+10+12+18+22+26 = 96
How many addends are there?

Group of Numbers
• Step 2 – Divide the sum by
the number of addends.
6)96 sum
# of addends
1
6
36
6
6
3

Group of Numbers
The mean or average of these
numbers is 16.
8, 10, 12, 18, 22, 26

What is the mean of these
numbers?
7, 10, 16
11

numbers?
2, 9, 14, 27
13

numbers?
1, 2, 7, 11, 19
8

numbers?
26, 33, 41, 52
38

Definition
Median
is in the
Middle

Definition
• Median – the middle
number in a set of ordered
numbers.
1, 3, 7, 10, 13
Median = 7

How to Find the Median in 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

Group of Numbers
• Step 2 – Find the middle
number.
21, 18, 24, 19, 27
18, 19, 21, 24, 27

Group of Numbers
• Step 2 – Find the middle
number.
18, 19, 21, 24, 27
This is your median number.

Group of Numbers
• Step 3 – If there are two middle
numbers, find the mean of
these two numbers.
18, 19, 21, 25, 27, 28

Group of Numbers
• Step 3 – If there are two middle
numbers, find the mean of
these two numbers.
21+ 25 = 46
2)46
23 median

What is the median of these
numbers?
16, 10, 7
10
7, 10, 16

numbers?
29, 8, 4, 11, 19
11
4, 8, 11, 19, 29

numbers?
31, 7, 2, 12, 14, 19
13
2, 7, 12, 14, 19, 31
12 + 14 = 26 2) 26

numbers?
53, 5, 81, 67, 25, 78
60
53 + 67 = 120 2) 120
5, 25, 53, 67, 78, 81

Definition
Mode
is the most
Popular

Definition
• A la mode – the most
popular or that which is in
fashion.
Baseball caps are a la mode today.

Definition
• Mode – the number that
appears most frequently in
a set of numbers.
1, 1, 3, 7, 10, 13
Mode = 1

How to Find the Mode in a
Group of Numbers
to greatest.
21, 18, 24, 19, 18
18, 18, 19, 21, 24

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

Which number is the mode?
29, 8, 4, 8, 19
8
4, 8, 8, 19, 29

1, 2, 2, 9, 9, 4, 9, 10
9
1, 2, 2, 4, 9, 9, 9, 10

22, 21, 27, 31, 21, 32
21
21, 21, 22, 27, 31, 32

Definition
Range
is the distance
Between

Definition
• Range – the difference
between the greatest and the
least value in a set of
numbers.
1, 1, 3, 7, 10, 13
Range = 12

How to Find the Range in a
Group of Numbers
to greatest.
21, 18, 24, 19, 27
18, 19, 21, 24, 27

Group of Numbers
• Step 2 – Find the lowest and
highest numbers.
21, 18, 24, 19, 27
18, 19, 21, 24, 27

Group of Numbers
• Step 3 – Find the difference
between these 2 numbers.
18, 19, 21, 24, 27
27 – 18 = 9
The range is 9

What is the range?
29, 8, 4, 8, 19
29 – 4 = 25
4, 8, 8, 19, 29

What is the range?
22, 21, 27, 31, 21, 32
32 – 21 = 11
21, 21, 22, 27, 31, 32

What is the range?
31, 8, 3, 11, 19
31 – 3 = 28
3, 8, 11, 19, 31

What is the range?
23, 7, 9, 41, 19
41 – 7 = 34
7, 9, 23, 19, 41

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