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Instructions for completing the first computer assignment in a basic statistics course, which involves using spss to create a scatterplot, find the correlation coefficient, and determine the regression line for a given dataset of temperature and oxygen consumption for birds. Students are required to submit printouts of their graphs and the correlation and regression coefficients.
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960:401 Basic Statistics for Research Computer Assignment 1: Follow the instructions to perform some simple data visualization, a correlation calculation, and a regression fit. Hand in
Statistics 401 (01) First Computer Assignment SPSS is an easy to use general-purpose statistical package that is commonly used in the social sciences and is installed on all Windows machines in the Campus Camputing Facilities public labs. It is also available over the dorm servers (again just for Windows). For this first assignment we will take a look at some bivariate data.
1. Opening SPSS. The details may vary by computer, but if there is no SPSS icon on the desktop, click on the “Start” button in the lower-left corner and then choose “Programs.” You should be able to find “SPSS,” or “SPSS 11 for Windows” on the pop-up menu. You may need to select the submenu “Math” first. 2. Get to the Data Editor. Depending on the details of your installation, you may get a screen titled “What would you like to do?” If so, choose, “Type in Data,” and then click “OK.” The top of the window should now say “SPSS Data Editor,” which looks a lot like a spreadsheet. There are two tabs in the lower left corner, “Data View” and “Variable View.” 3. Name your variables. Click on “Variable View.” You should see “Name,” “Type,” and so on across the top of the spreadsheet. The full dataset that we will use is given on the last page. There are two variables, “Temperature” and “O Consumption.” SPSS won’t let you use spaces or more than 8 characters (!), so you might abbreviate the names to “Temp” and “O2.” Type those names in the first column of the “Name” column. If you hit the “tab” key, SPSS will fill in the rest of the columns with defaults. All of the defaults are fine for this example. If you had a qualitative variable, you could click next to the word “Numeric” to change the “Type” from “Numeric” to “String.”
- Appendix - Temp O