ch7studentnotes.notebook
November 11, 2013
Chapter 7
Graphing
Nov 14­4:55 PM
7.1 Bar graphs
Bar Graph: a graph that uses bars to show a set of data
Double Bar Graph: a graph in which data are compared by rectangular bars drawn next to each other Nov 16­8:38 AM
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November 11, 2013
The graph shows the
number of students
that have each type of
pet listed.
How many cats do the
students have?
What pet did the
students have the least
amount of?
How many total pets did
the class have?
May 11­4:51 PM
There are 22 students in Miss Miller's class, 18 students in Mrs. Humphrey's class, 14 students in Mrs. Johnson's class, and 25 students in Mrs. Smith's class. Construct a bar graph to represent this information. May 11­4:15 PM
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November 11, 2013
Which last name is the most popular?
Which name is there the greatest difference between males and females?
Which last name do most of the females have? Males? Which last name is equal among men and women at the family reunion?
Nov 28­9:49 AM
In all, who gives the most homework? Who gives the most homework on Wednesday? Thursday?
Which teacher gave the greatest difference of time spent on homework between Wednesday and Thursday?
How many minutes did Ms. Jones' students spend on homework on Wednesday?
Nov 28­9:50 AM
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November 11, 2013
Which sport is liked the best among 3rd and 4th graders?
Which sport is liked best by the 3rd graders? 4th graders?
Which sport has the largest difference between grade levels?
How many 3rd graders were surveyed? 4th graders? How many students liked swimming?
Nov 28­9:50 AM
Number of Students
Basketball
Football
Soccer
Baseball/
Softball
Other
Nov 28­9:51 AM
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November 11, 2013
Number of Students
Boys
Girls
Basketball
Football
Soccer
Baseball/
Softball
Other
Nov 28­9:53 AM
A Line Graph
Line graphs are used to track changes over short and long periods of time. When smaller changes exist, line graphs are better to use than bar graphs.
Line Graph
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Let's analyze the data on this chart.
ake
s m
Let'
.
aph
e gr
n
a li
Line Graph
Line graph ­ example
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Sales of fudge sundaes
How many sundaes were sold in May?
80
In which month were 90 sundaes sold?
August
Page 2
Double line graphs
Which grade received the
most SSAs in week 4?
In which week were the most
SSAs awarded?
G7
Week 5
In which week(s) did G7 get more SSAs than Grade 6?
Weeks 4 & Which grade level had the most
SSAs in total in this period?
Which grade level had the most
SSAs in total in this period?
G6
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What about Graphs & Charts?
Graphs and charts are great because they communicate information visually. You can see them in a newspapers, magazines and businesses around the world.
Sometimes, complicated information is difficult to understand and needs an illustration. Graphs or charts can help people understand your point quickly and simply.
Click on chart to fade out
Here you will find five different graphs and charts for you to consider. Intro
Not sure about which graph to use? Confused between bar charts, line graphs, and pie charts? Let's explore Charts.
Intro
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A Line Graph
Line graphs are used to track changes over short and long periods of time. When smaller changes exist, line graphs are better to use than bar graphs.
Line Graph
A Bar Chart
Bar charts are used to compare things between different groups or to track changes over time. However, when trying to measure change over time, bar charts are best when the changes are larger.
Bar Chart
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A Pie Chart
Pie charts are best to use when you are trying to compare parts of a whole. They do not show changes over time.
Pie Chart
Venn Diagram
The Venn Diagram is made up of two or more overlapping circles. It is often used in mathematics to show relationships between sets. Venn Diagrams are useful for examining similarities and differences. This activity enables students to organize similarities and differences visually .
Aug 26­11:36 AM
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November 11, 2013
Pictograph
A pictograph uses pictures or symbols to represent an assigned amount of data.
A pictograph takes the form of a bar graph.
The key for a pictograph tells the number that each picture or symbol represents.
Aug 26­11:36 AM
Electoral Votes by States
Use the Data in the tally chart to complete the missing row in the pictograph.
Each = 2 votes
State
Votes
State
Montana
Montana
Tennessee
Tennessee
New Jersey
New Jersey
Alabama
Alabama
Rhode Island
Rhode Island
Votes
Alabama
Click on Star for answer.
Aug 27­9:31 AM
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7.5 Misleading graphs
­Broken axis
­uneven intervals
­squished graphs
­using different size pictures in a pictograph
­too small intervals
Nov 14­4:31 PM
Graphs and statistics are often used to persuade. Advertisers and others may accidentally or intentionally present information in a misleading way. Mar 19­7:45 AM
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Here are some ways a graph may be
misleading.
Pull
An axis is "broken" or numbers are left off an axis.
Because the sca
100, the bar heig
appear that the s
about three time
as either of the o
In fact, the sixth about 20% more
Mar 19­7:45 AM
Here are some ways a graph may be
misleading.
Pull
The intervals on an axis are not the same length.
Notice the vertic
spacing between
bigger then the s
18,000 and 36,0
Mar 19­7:45 AM
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Here are some ways a graph may be
misleading.
Pull
The scale is compressed so that it's hard to see
difference among the categories.
The vertical scale
not small enough
changes.
Mar 19­7:45 AM
Here are some ways a graph may be
misleading.
Pull
Pictorial graphs could distort the data.
The difference in
car and trick sym
comparison.
Mar 19­7:45 AM
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November 11, 2013
1. What is the average
theme park attendance
at 10 am?
Average Houly Attendance at Theme Park
900
600
500
400
300
200
7 pm
6 pm
5 pm
4 pm
3 pm
2 pm
0
______________________
1 pm
100
12 pm
3. At what time of day is
the attendance the
same as at 2 pm?
700
11 am
______________________
800
10 am
2. What is the average
attendance at 2 pm?
Number of People
______________________
TIME
Sep 21­4:43 PM
1. Which Class has
sold more popcorn
tins?
$250
$200
$150
$100
0
ro
3. Which item has
the junior class sold
the fewest of?
fr Bo
es x h of
fr ui
t
$50
Po
____________________
Sophomors
Juniors
as Ho
te ne
d y
nu
ts
m
us C
g off
an ee
d m
in
ts
2. About how much
money has the
sophomore class
raised selling
popcorn?
(First week sales)
p
tin co
s rn
____________________
High-School Fund -Raiser
____________________
Sep 21­5:26 PM
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How Teenagers Spend Their Money
1. What percent of
teenager's spending
money is spent on
clothes?
(Monthly spending money)
2. What percent of
their money do
teenagers spend on
food?
Cell Phone
25%
Presents
10%
____________________
School
Supplies
5%
Food
15%
____________________
3. What percent of
a teen's spending
money is spent on
presents?
Clothes
35%
Music
CDs
10%
____________________
Sep 24­7:29 AM
1. What school activities do
each of the tree circles in
the Venn diagram
represent?
Orchestra,
Chorus, Band
Sports
____________________
2. How many high­school
students had only Orchestra,
Chorus, Band as their
activity?
417
98
74
23
376
48
____________________
234
3. How many students only
playes Sports?
____________________
Speech, Debate, Drama
Sep 24­7:40 AM
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Nov 28­9:00 AM
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