Create a statistical portrait of the people from the Rikers 1989 2.sav dataset who were arrested for a particular crime. Your description should include statistics that summarize the distribution of age, prior misdemeanors, felonies and open cases, as well as at least four other variables that you choose. Your report should include at least two bi-variate comparisons.
1) Review the kinds of crimes for which the people in the dataset were arrested, using either the aucr1 (Uniform Crime Reports most serious charge) variable or the asev1 (severity level of the most serious charge) variable.
2) Choose a group to write about – based on offense level (asev1) or type of crime (aucr1). Look for the value associated to the level of severity or to the crime type. In PSPP, you will see the value in the Frequencies table. In SPSS, you have to use the VALUES column in Variable View.
3) Select, using Select Cases from the DATA menu, the records for the people you have chosen to study. (Look in the SPSS Work section of Blackboard for the Step-by-Step Guide to Selecting Cases). There are instruction sections for PSPP, SPSS 20 & SPSS 11.5.
4) Use the Frequencies, Descriptives and/or Compare Means procedures to generate charts and statistics for the four required quantitiative variables, age, prior misdemeanors, felonies and open cases. (Look in SPSS Work for the Step-by-Step Guides to these procedures).
5) Use Frequencies and/or CrossTabs to generate the tables and charts or statistics on other variables measured at the ordinal or nominal level.
6) If you use SPSS, you can copy results from SPSS into a Word document and write several paragraphs describing your sample of the arrestees from the 1989 Rikers dataset. If you use PSPP, save your output (tables, charts and graphs) as a PDF file and write the summary of your data in Word.
SPSS is a statistics software program that is available on the pcs in all labs at John Jay College. There are two versions installed on the lab pcs – SPSS version 11.5 and SPSS version 20. They are not different in the statistical functions we will use in any important way. There is also a freeware version called PSPP.
You will have work to do each week using SPSS, so each student must decide whether to make time to do the SPSS work in one of the John Jay labs or purchase the program for home use or download the free version – PSPP.
The advantage to working in the labs at John Jay is that, during StatLab hours, there will be a lab assistant to help with the use of the program.
If you decide to work on the program at home, you will need to purchase a copy of the program or download a trial version or download and install the freeware version, PSPP. Purchasing directly from SPSS, even for students, is fairly expansive, and I suggest that you purchase a license for a semester or a year from e-academy (link below) or purchase a book that comes with some version of the program.
You can download and use SPSS 20 for three weeks, free of charge, from this link at the SPSS website. If you are considering home use, I suggest that you download this trial version – to make sure you really want to use the program at home.
You first create an account at SPSS. Then proceed to download the trial version of SPSS 20
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