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Material Type: Assignment; Class: Statistics; Subject: Mathematics; University: Wofford College; Term: Unknown 1989;
Typology: Assignments
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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: (I’m using an older version of Widows so there may be some minor differences.) 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 InteractiveScatter Plot…. Drag x to the vertical axis and y1 to the horizonal axis as 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.