Data Analysis
Source: The above ppt has been adapted to suit class.
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What is the purpose of a data table?
What are the 3 key parts of a data table?
What is the purpose of a graph?
Describe two types of common graphs
How do I make a graph?
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Data table is used to:
 Collect & record data during an experiment
 Keep track of experimental trials
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Title
 Tells purpose of experiment
 Mentions both the I.V. & D.V.
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Columns
 Left usually used to record the I.V. from smallest to
largest
 Right usually used to record D.V.
▪ Multiple trials are recorded as subdivisions of the D.V. column
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Averages
 The values of the multiple trials are averaged &
recorded in a final RIGHT column, next to the D.V.
column
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Graphs are used to represent your data
findings
They help you analyze & communicate your
data
Need graphs to help report your results
Line Graph
 Used when I.V. is a quantitative (involves numbers)
measurement. When the data is continuous, in other words
there are an infinite number of values in between two listed
values. Examples: height, length, volume, mass, time, etc.
Bar Graph
 Used when I.V. is qualitative (doesn’t involve numbers) or
categorical or when COUNTING which does involve
numbers, but there are not an infinite number of values in
between. You can’t have 1.2 people.
▪ Examples: days of the week, colors, types, brand names,
counting,etc.
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Clearly label your title, y-axis, and x-axis
Include units and/or names
 Ex: cm, seconds, brands, types, etc.
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Remember to graph on the correct axes
 I.V. goes on the x-axis
 D.V. goes on the y-axis
DRY
MIX
Dependent Responding Yaxis Manipulated Independent Xaxis
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What is the relationship between the distance
below the surface and the number of fossils
collected? The students collected three
buckets at each location. At 80 cm below
there were 0, 0, and 1 fossil; 140 cm had 2, 3,
and o fossils, 200 cm had 8, 10 and 7 fossils,
260 cm had 15, 16, and 16 fossils; and 320 cm
had 32, 30, and 35 fossils.
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What is the relationship between the distance
below the surface and the number of fossils
collected? The students collected three
buckets at each location. At 80 cm below
there were 0, 0, and 1 fossil; 140 cm had 2, 3,
and o fossils, 200 cm had 8, 10 and 7 fossils,
260 cm had 15, 16, and 16 fossils; and 320 cm
had 32, 30, and 35 fossils.
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What is the relationship between the distance
below the surface and the number of fossils
collected? The students collected three
buckets at each
location.
At
80
cm
below
Underline your IV & DV
there were 0, 0, and 1 fossil; 140 cm had 2, 3,
and o fossils, 200 cm had 8, 10 and 7 fossils,
260 cm had 15, 16, and 16 fossils; and 320 cm
had 32, 30, and 35 fossils.
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What is the relationship between the distance
below the surface and the number of fossils
collected?
The
Copy
all ofstudents
the I.V. datacollected
in one color.three
buckets at each location. At 80 cm below
there were 0, 0, and 1 fossil; 140 cm had 2, 3,
and o fossils, 200 cm had 8, 10 and 7 fossils,
260 cm had 15, 16, and 16 fossils; and 320 cm
had 32, 30, and 35 fossils.
Copy all the D.V. data in another color
D.V.
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What is the relationship between the distance
below the surface and the number of fossils
collected?
The
Copy
all ofstudents
the I.V. datacollected
in one color.three
buckets at each location. At 80 cm below
I.V.
there were 0, 0, and 1 fossil; 140 cm had 2, 3,
and o fossils, 200 cm had 8, 10 and 7 fossils,
260 cm had 15, 16, and 16 fossils; and 320 cm
had 32, 30, and 35 fossils.
Copy all the D.V. data in another color
Now, draw the number of columns you think you will need
fill in is
thethe
datarelationship
where you thinkbetween
it belongs. the
Remember
and
What
distance
to
includethe
enough
columns
for the
multiple
trials & of
averages
below
surface
and
number
fossils
(hint: You will use 5 columns?)
collected? The students collected three
buckets at each location. At 80 cm below
there were 0, 0, and 1 fossil; 140 cm had 2, 3,
and o fossils, 200 cm had 8, 10 and 7 fossils,
260 cm had 15, 16, and 16 fossils; and 320 cm
had 32, 30, and 35 fossils.
D.V.
Multiple Trials
I.V.
# of Fossils
Collected
# of Fossils
Collected
# of Fossils
Collected
Bucket 1
Bucket 2
Bucket 3
80 cm
0
0
1
0
140 cm
2
3
0
2
200 cm
8
10
7
8
260 cm
15
16
16
16
320 cm
32
30
35
32
Distance
Below Surface
Average # of
Fossils
Collected
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Decide which type of graph would be most
appropriate for this set of data and create
your graph
Remember to label and title and include
relationship statement.
Fossils collected vs. distance below the surface (cm)
DRY
MIX
Relationship statement
Number of
fossils
collected
32
As the
distance
below the
surface
increases,
the number
of fossils
collected
increases
exponentially
28
24
20
16
12
8
4
0
50 100 150 200 250 300 350 400
Distance below the surface in cm.