Scatter Plot
(A worked Problem: Procedure explained in more detail in Chapter 7)
Scatter Plot
(A worked Problem: Procedure explained in more detail
in Chapter 7)
Ten statistics students have taken the first exam. Below you will find the test score on the first exam and the student's current homework score. The maximum possible score on the test was 100 points and the maximum possible score on homework is 50 points.
Create a scatterplot for the following scores.
Student
Test
Score (X)
Homework
Score (Y)
Robert
61
35
Thomas
95
50
Mark
44
5
Wanda
93
50
Judy
63
15
Haydn
80
34
Barbara
62
16
Karen
95
50
Marilyn
65
7
Phil
88
38
I. Label the Axes (remember the rules discussed in chapter 3)
A. Label the X Axis
The X Axis includes test scores
that go from a minimum of 44 to a maximum of 95.
The numerical lables must at least cover the
minimum and maximum scores.
You must also lable these scores as Test
Scores.
B. Label the Y Axis
The Y axis includes homework
scores that go from a minimum of 5 to a maximum of 50.
The numerical lables then can easily go from 0
to 50
You must also lables these scores Homework
Scores
II. Begin to plot the points
A. The first point is for Robert...His test score (X) is 61 and his homework score (Y) is 35.
B. Next plot the point for Thomas....(95, 50)
III. Finish ploting the rest of the points.
IV. Now you can view the completed scatter plot and notice that the points
tend to go up to the right.
This positive slope indicates a positive
correlation between test scores and homework scores.
Hint: Remember that a scatter plot is a graph of just points.....Do not connect the dots.
Copyright © 2004 by Mark W. Vernoy