Download Mean, Median, Mode and Range - umm-mabed-math

Did You Know…
Mean, Median,
Mode and
Range
Today We Will Learn…
Mean
Median
Mode
Range
And how to use these in everyday
life, as well as the classroom!
Ready to start
What Do We Already Know?
Sure, the words “Mean, Median, Mode
and Range” all sound confusing…
But what about the words we already
know, like “Average, Middle, Most
Frequent, and Difference”?
They are all the same ideas!
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
Mean
Mean is the average of a
set of data. To calculate
the mean, find the sum of
the data and then divide
by the number of data
Example:
What is the mean of these
numbers?
7, 10, 16
First, find the sum of the data.
7+10+16=33
Then divide by the number of data.
33 ÷3=11
Definition
Median
is in the
Middle
Median
Median is the middle
number in a set of data
when the data is
arranged in numerical
order.
Example:
What is the median of these
numbers?
1, 10, 7, 3, 13
First, arrange the data in
numerical order.
1, 3, 7, 10, 13
median=7
Example:
What is the median of these
numbers?
28, 27, 21, 19, 25, 18
First, arrange the number In order
from least to greatest.
18 , 19, 21, 25, 27,28
If there are two middle numbers,
find the mean of these two
numbers.
18 , 19, 21, 25, 27,28
21+ 25 =46
Median :46 ÷ 2 =23
Definition
Mode
is the most
Popular
Mode
The mode is the
number that occurs
the most.
Example:
Baseball caps are the mode.
Example:
12, 15, 11, 11, 7, 13
The mode is 11.
How to Find the Mode in a
Group of Numbers
Step 1 – Arrange the numbers
in order from least to greatest.
29, 8, 4, 8, 19
4, 8, 8, 19, 29
Step 2 – Find the number that
is repeated the most.
4, 8, 8, 19, 29
The mode is=8
Sometimes a set of data will have
more than one mode.
In the following set the numbers
both the numbers 5 and 7 appear
twice.
2, 9, 5, 7, 8, 6, 4, 7, 5
The mode =7, 5
Sometimes there is no mode in a set of data.
3, 8, 7, 6, 12, 11, 2, 1
There is no mode!
You can remember that
mode means the number
that occurs the most
because “mode” and
“most” sound alike!
Definition
Range
is the distance
Between
Range
the difference between the
greatest and the least value in a
set of numbers.
How to Find the Range 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
Step 2 – Find the lowest and
highest numbers.
18, 19, 21, 24, 27
Step 3 – Find the difference
between these 2 numbers.
27 – 18 = 9
The range is 9
Example:
What is the range?
29, 8, 4, 8, 19
4, 8, 8, 19, 29
29 – 4 = 25
Mean
Median
Mode
The average
The number or
average of the
numbers in the
middle
The number that
occurs most
Directions: Use the clicker to match each word in the
left column with the correct statistics term on the right.
Match
1. Average
A. Mode
2. Middle
B. Range
3. Most Frequent
C. Median
4. Difference
D. Mean
We finish……………