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Statistics LibreTexts

8.E: Advanced Graphs (Exercises)

General Questions

Q1

What are \(Q-Q\) plots useful for?

Q2

For the following data, plot the theoretically expected \(z\) score as a function of the actual \(z\) score (a \(Q-Q\) plot).

0 1.2
0 1.2
0 1.2
0 1.2
0 1.3
0 1.3
0.1 1.3
0.1 1.3
0.1 1.3
0.1 1.4
0.1 1.4
0.2 1.5
0.2 1.6
0.3 1.7
0.3 1.7
0.4 1.7
0.5 1.8
0.6 1.8
0.6 1.9
0.6 1.9
0.6 2.0
0.6 2.0
0.6 2.0
0.6 2.1
0.6 2.1
0.6 2.1
0.7 2.1
0.7 2.1
0.8 2.1
0.8 2.1
0.8 2.3
0.8 2.5
0.8 2.7
0.9 3.0
1.0 4.2
1.0 5.0
1.1 5.7
1.1 12.4
1.2 15.2
1.2  

Q3

For the data in problem 2, describe how the data differ from a normal distribution.

Questions from Case studies

Q4

For the "SAT and College GPA" case study data, create a contour plot looking at University GPA as a function of Math SAT and High School GPA. Naturally, you should use a computer to do this.

Q5

For the "SAT and College GPA" case study data, create a \(3D\) plot using the variables University GPA, Math SAT, and High School GPA. Naturally, you should use a computer to do this.

Contributor

  • Online Statistics Education: A Multimedia Course of Study (http://onlinestatbook.com/). Project Leader: David M. Lane, Rice University.