Scatter Plots and Correlation Coefficients - Homework II | MATH 140, Assignments of Statistics

Material Type: Assignment; Class: Statistics; Subject: Mathematics; University: Wofford College; Term: Unknown 1989;

Typology: Assignments

Pre 2010

Uploaded on 08/19/2009

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SPSS Assignment 2: Scatter Plots & Correlation Coefficients
This and subsequent tutorials assume you have completed previous tutorials. In this tutorial you will
learn more about entering and working with data as well as how to create a scatter plot and calculate
correlation coefficients.
Start SPSS as before and go to the data entry screen, SPSS Data Editor. In the first four columns,
enter the data from problem 9 on page 137 of your text. You’ll want to enter the x and y values
from part a) and the y values from part b and c since the x data is the same for all three parts. Your
screen should look something like this:
Click on the Variable View tab at the bottom. Change the variable names to x, y1, y2, and y3 and
the number of decimal places to 0 for each. Your screen will look something like this:
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SPSS Assignment 2: Scatter Plots & Correlation Coefficients

This and subsequent tutorials assume you have completed previous tutorials. In this tutorial you will learn more about entering and working with data as well as how to create a scatter plot and calculate correlation coefficients. Start SPSS as before and go to the data entry screen, SPSS Data Editor. In the first four columns, enter the data from problem 9 on page 137 of your text. You’ll want to enter the x and y values from part a) and the y values from part b and c since the x data is the same for all three parts. Your screen should look something like this: Click on the Variable View tab at the bottom. Change the variable names to x, y1, y2, and y3 and the number of decimal places to 0 for each. Your screen will look something like this:

When you return to the Data View tab, you screen will look something like this: From the Graphs menu, select Scatter Plot… as shown:

Then click on OK. This will generate the scatter plot shown here. From the Analyze menu, select Correlate Bivariate…. Select x and y1 and click on OK. This will add correlation information to your output. It should be

  • 0.800 if you didn’t make any mistakes entering the data.

Print this page. You’ll be turning it in. Now, from the File menu on the SPSS Data Editor Page, select Save. Save the data to the desktop and exit SPSS. Double-click on the data file you saved to the desktop. This should open SPSS and restore the data. Using the approach describe above, find the correlation coefficients for x and y2 and for x and y3. Write these on you printout being careful to label each and turn this in.