Find Mean, Median, and Mode Using Line Plots

Find Mean, Median, and Mode Using Line Plots

SDAP 1.2 Identify the mode(s) for sets of categorical data, and the
mode(s), median, and any apparent outliers for numerical data
sets.
UNDERLYING SKILLS AND CONCEPTS:
meaning of mode, median and outlier;
understand line plot
Find Mean, Median, and Mode Using Line
Plots
a
K
ey Ide
You can use a line plot to find mean, median, mode, and outliers
of data sets.
Remember the median is the middle number when the numbers are
written in order. When there are two middle numbers, the median is the
mean of the two middle numbers.
The mean is the average of a set of data. The mean is found by finding the
sum of the data and then dividing the sum by the number of data.
The mode is the number that is listed most often in a set of data.
Sometimes there is no mode. Sometimes there is more than one mode.
An outlier is a number that is much lower or much higher than the rest of the
data set. It is either much lower or much higher than the other numbers.
This line plot shows the number of raisins in each muffin.
1
2
x
x
x
x
x
x
x
x
x
3
4
5
6
7
x
8
9
10
What is the median? 4
What is the mean?
3 3 4 4 4 4 5 6 7 10 50
50 10 5
What is the mode? 4
What is the outlier? 10
page 356
I love writing
these 's!
Chapter 30 – Lesson 4
D – © CSL Associates, Inc. All rights reserved.
E x am p l E
Name
P RAC T I C E
This line plot shows the number of students of each age in Linda’s
reading group.
1 2 3 4 5 6 7 8 9 10
1. What is the median?
8
2.
What is the mean?
8
3. What is the mode?
8
4.
What is the outlier?
6
D – © CSL Associates, Inc. All rights reserved.
This line plot shows the number of hours each student does homework.
0
1
2
3
4
5
6
5. What is the median?
1
6. What is the mean?
1
1 7. What is the mode?
1
8. What is the outlier?
6
Math
Reasoning
Mean, Median, and Mode
2
MR 2.3
5. Which of these is easy to find using a line plot?
mean, median, mode, outlier
mode or outlier
Chapter 30 – Lesson 4
page 357
MCX94.HW.CL.G4.FM&Lesson.v211
8/2/04
19:17
Page 240
Name
P RAC T I C E
…at home!
This line plot shows the number of students of each age on Linda’s
swimming team.
1. What is the median?
6
2. What is the mean?
6
3. What is the mode?
6
4. What is the outlier?
4
Math
Reasoning
Mean, Median, and Mode
MR 2.3
5. Which of these is easy to find using a line plot?
mean, median, mode, outlier
mode or outlier
page 240
Home Resource and Homework
Chapter 30 Lesson 4
D – © CSL Associates, Inc. All rights reserved.
1 2 3 4 5 6 7 8 9 10
MCX94TEG4Ch01_32.v8.5.2 2/26/01 19:07 Page 657
Name
P RAC T I C E
This line plot shows the number of students of each age in Linda’s
reading group.
1 2 3 4 5 6 7 8 9 10
1. What is the median?
8
2.
What is the mean?
8
3. What is the mode?
8
4.
What is the outlier?
6
D – © CSL Associates, Inc. All rights reserved.
This line plot shows the number of hours each student does homework.
0
1
2
3
4
5
6
5. What is the median?
1
6. What is the mean?
1
1
7. What is the mode?
1
8. What is the outlier?
6
Math
Reasoning
Mean, Median, and Mode
2
MR 2.3
5. Which of these is easy to find using a line plot?
mean, median, mode, outlier
mode or outlier
Chapter 30 – Lesson 4
Student Book Page
page 357
Name
P RAC T I C E
…at home!
This line plot shows the number of students of each age on Linda’s
swimming team.
1. What is the median?
6
2. What is the mean?
6
3. What is the mode?
6
4. What is the outlier?
4
Math
Reasoning
Mean, Median, and Mode
MR 2.3
5. Which of these is easy to find using a line plot?
mean, median, mode, outlier
mode or outlier
page 240
Home Resource and Homework
Chapter 30 Lesson 4
D – © CSL Associates, Inc. All rights reserved.
1 2 3 4 5 6 7 8 9 10