Surviving SPSS.

Transcription

1 Surviving SPSS Debby Kermer George Mason University Libraries Data Services Research Consultant

2 Mason Data Services Geospatial Analysis and Mapping Wendy Mann Joy Suh Debby Kermer Finding & Archiving Data, Data Management Plans Qualitative & Quantiative Methods, Analysis, & Software

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4 Download the Dataset Go to: Find SPSS I then click Datafile Complete the form and read the user agreement Click Submit and Download Data Save the file where you can find it Open the file (by default PST 11 05c.sav ) Double Click or File Open (if SPSS is open)

5 Download the Dataset Go to: The file will download Double Click or File Open (if SPSS is open)

6 Open the Dataset Click the Workshop Files Icon: Or, go to the "W" drive. Choose SPSS Workshop Files Open PST 11 05c.sav Double Click or File Open (if SPSS is open)

7 Data View

8 Data View Look at the Data Window Confirm you are in Data View Where are Variables? Where are Cases?

9 Navigating Data View Variables are in columns Find variable q2 Make q2 wider Cases are in rows Determine the # of cases (scroll down)

10 Values & Labels Press or use View Value Labels Value = What is stored and analyzed; the "actual" value Label = What is displayed; the characteristic or group Value Label 1 English 2 Spanish

11 Switching Views #1: Click on the Tabs or #2: Double-Click on the Blue Header area Variable View Data View From Data View, double click q2 to switch views

12 Variable View

13 Variables & Values Name "Nickname" Label Variable Label Values Value Labels

14 Variable Types Type Storage & Analysis Type Numeric = For numeric or categorical (label the values) String = For essay text; only keeps text up to the Width Measure Level of Measurement Avoids incorrect analysis Scale (Interval/Ratio) Ordinal Nominal String / Nominal

15 Missing Values System Missing. (a period) User Missing 7 = N/A 8 = Don t Know 9 = Refused

16 Q.2 Name: q2 Type: Numeric Label: Generally, how would you say things are these days in your life -- would you say that you are very happy, pretty happy, or not too happy? Width: 1 Measure: Ordinal Values: 1 = Very happy 2 = Pretty happy 3 = Not too happy 9 = Don t know/refused

17 User Missing Values Add 9 as a User Missing value for q2

18 Data View Display Decimals # of decimals shown (in output, too) Column Width of the column Align Justification of values in column only affects the look in Data View

19 Analyze Menu

20 Descriptive Statistics Analyze Descriptive Statistics Frequencies How happy are people with their life?

21 Finding Variables Find q2 q2 or Type name VERY FAST Right Click to re sort

22 Choosing Variables Move q2 to the box then click OK or Click the arrow Double Click the name

23 Output Window / Viewer Outline

24 Output Tables Variable Name Variable Label Value Value Label

25 Edit Options: General

26 Edit Options: Output

27 SPSS Syntax

28 Syntax Syntax

29 Keeping Syntax A. Copy from Output OR B. Press Paste in Dialog Double-Click to allow copying. Paste into Syntax Window. Pasting does not Run the command. So, run it yourself.

30 Choosing Multiple Variables Analyze Descriptive Statistics Frequencies Select q3a to q3j Then, Click Paste Hold Ctrl click on each Press Shift click on last

31 "Running" Syntax 1. Highlight what to "Run" 2. Press the "Play" Button

32 Q.3a j

33 Reproducible Variable Properties

34 Defining Variable Properties

35 Editing Syntax Original Copy Paste Then Run!

36 Goal Is there a relationship between happiness and having pets? Happiness q2 Have pets q75 1 Happy = 1 & 2 0 Not Happy = 3 1 Has Pets = 1 0 No Pets = 2+ Use Edit Go to Variable

37 Windows

38 Data.sav Windows Output.spv Syntax.sps Unsaved Active Inactive

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40 Frequencies & More Analyze Descriptive Statistics Frequencies For the Q3 Series, get: Mean Median SD Min Max Range Don't forget to choose Paste, then Run.

41 Tip Double-click the table to open it in a separate window Click Pivot Transpose Rows and Columns

42 Finishing Touches Make the column wider (same as Excel)

43 SPSS Syntax Starts with a COMMAND, ends with a period.

44 COMMENT COMMENT The following is for SPSS with Syntax. OR * The following Is for SPSS with Syntax. **********************. **** Leave a Comment ***.

45 Transform Menu Working with Variables

46 Compute Goal: Make an index of topical happiness Transform Compute Variable New Variable Name: happy_score Summary Function: MEAN

47 Avoiding Frequency Tables

48 Recode Goal: Recode q76_1 into pets Step 1: Descriptive Statistics on q76_1 Step 2: Plan new values 1 2 Dog Other Pet 3 No Pet

49 Recode Goal: Recode q76_1 into pets Transform Recode into Different Variables

50 Labeling

51 Labeling with Syntax Data Define Variable Properties

52 Variable Properties 1 2 Dog Other Pet 3 No Pet

53 Data Menu Working with Cases

54 Weighting # of people a case represents, accounts for the over or under representation of a group In Readme PST txt The WEIGHT variable is the weighting variable Data Weight Cases Look for or Select: Weight cases by: weight

55 Selecting [a Subset of] Cases Goal: Do analysis on only those who have a pet. Data Select Cases Filtering ignored cases 0 or missing value included cases every other value

56 Splitting a File for Comparison Goal: Compare happiness among those with pets Data Split File Turn off Grouping Add group as a factor for each analysis Do analysis for one group, then for the other Choose Compare groups Move gender to box

57 Status Bar Shows status of: Filter Split and Weighting

58 Return to Normal Turn off Grouping Data Split File Turn off Filtering Data Select Cases

59 Finishing Up

60 DataSets

61 If there are ERRORS Try to Fix the 1 st Error only That is often the cause of the following errors Actually read the error message They can be long, but are often informative It may offer suggestions Use the message to identify the exact spot Look for the variable name or text given

62 More Troubleshootng Are "Transformations Pending"? Changes to data require an EXECUTE. Does the command end with a period? Are there blank lines in the middle of a command? Blank lines act as periods Are your variable names correct? Do the variables have the values you expect?

63 Save Files File Save As Data File & Output File & Syntax File To Exit, click Yes

64 Saving Output Click and press the Delete Key

65 Questions by Debby Kermer, Mason Library Data Services cbna This work is licensed under the c Attribution- NonCommercial-ShareAlike International License: