day16

CS 103 Day16, Monday April 30, 2001 revised, final

**Using How to use SPSS, by Brian C. Cronk**

It doesn't have an index: Make one yourself as you go through--on a back page.
Be sure you have the Addenda for versions 9 and 10, either printed in your book covers or as handout.

Class notes:
Coming to SPSS version 10 from Excel

SPSS is a statistics-only package; Excel is a Swiss-Army-knife general computational package.
SPSS arranges data in the usual column=variable, row=individual/case format.
Excel mixes data and analysis and output and graphs all together on one worksheet.

Data and Output separate

Data all "lives" in the Data Editor. (You'll learn to compute new variables from old in ch.2).

When you save a file from within the Data Editor (a .sav file) only the data is saved.
Only one data file can be in the Data Editor at a time. To change, save the old one and then load or make the new one.
The Data View allows you to change or add data values. The Variable View sets characteristics of the variables. Cronk Sec. 1.3, pp. 2-5 introduces this. The Data>DefineVariable option of earlier versions is replaced by Variable View.

Analyses and graphs "live" in the output window. To save output, save in the output window (as a .spo file).

The output window is like a long scroll that is written on. Once written, it doesn't change.

won't update

looks

Output can pile up fast. Delete stuff that's wrong or outdated right now!

Learning SPSS--
Cronk gives a couple of pages of explanation, then a practice exercise. Read through, then work on the exercise, returning to the text as you need to.
Chapter 1 Learn to:

Create variables, with explanatory labels

p. 3: Instead of Data>Define Variable, click on the Variable View tab. Use row 1 for the variable id. All the items that used to be "buttons" are now "columns"--click in the column and the row you want to change.
Create the variable ID. Create the variable DAY, with label "Day of Class" (like picture, bottom p. 3)

Code numerical values with labels for categorical data. This now is column Values, not Labels button. Click the ... to get the dialog box shown at the bottom of p. 3.

For variable DAY pp.3-4: 1= "Mon/Wed/Fri", 2 = "Tues/Thurs"

Save and load a data file. Sec. 1.4 pp. 5-6
First analysis: Find a mean (among other descriptive statistics) Sec. 1.5 pp. 6-7
~~Statistics~~ --> Analyze, ~~Summarize~~ --> Descriptive Statistics (see addendum for vers. 9 and 10)
Use the Output window

Print (p. 8)
Copy to Word (p.8)

(Not in text) Print the data file: From the Data Editor, do File>Print.

It will print out pretty much as it appears on the screen. Use Print Preview.

Change it back

You can alter the looks in the Data Editor in a couple ways only.

--View>Fonts will change the font or size for the whole data set.

--To change column width, mouse over a column border in the gray names row. Drag the border when it is a double arrow. (It won't move till you "drop" )

Next: Continue with Ch. 2, working along with the text.

Assignment 11 , Due Friday, Day 18, May 4

A. Do the Practice Exercises, p.4, p.6, p.8, Hand in the printout of the descriptives, p.8.
Remember ~~Statistics~~ --> Analyze, ~~Summarize~~ --> Descriptive Statistics (see addendum for vers. 9 and 10)
B. Use p.8, paragraph 2, follow the directions and copy your descriptives table to a Microsoft Word document. Notice it pastes as a Word Table. (If the gridlines don't show in Word, do Table>Show Gridlines.) Format it so it looks nice in Word, add your name to the document, and print it to Hand in. (Your gridlines don't show in the printout. That's OK)
C. Do the Practice Exercise p.10. Print out the raw data (see notes above.): Hand it in.

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