Get ready to work on practice problems

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    10-Feb-2016

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Get ready to work on practice problems. Create a directory and subdirectory on your computer named C:\StudentData\SW318_Spring_2004 . Download and install the Microsoft .Net Framework Version 1.1 on your computer. See: How to Get the . NET Framework 1.1 - PowerPoint PPT Presentation

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  • Get ready to work on practice problemsCreate a directory and subdirectory on your computer named C:\StudentData\SW318_Spring_2004. Download and install the Microsoft .Net Framework Version 1.1 on your computer. See: How to Get the .NET Framework 1.1 Download the program, the data files, and the problem sets to the C:\StudentData\SW318_Spring_2004 directory on your computer. Open the C:\StudentData\SW318_Spring_2004 folder on your computer and click on DoPracticeProblems.exe. When DoPracticeProblems.exe starts running on your computer, it will show an Open File dialog window.

  • How to use Practice Problems tool: Open problem setSelect a problem set and click Open

  • How to use Practice Problems tool: Solve practice problemsFirst, read a question, look at SPSS data or output, and select your answer.Second, click on Show Correct Answer button to see the right answer.

  • How to use Practice Problems tool: Instructors feedbackSecond, check whether your answer is right and read carefully the instructors comment on this problem.First, click on the Feedback tab to see feedback for the question

  • How to use Practice Problems tool: Next problemTo go to the next problem, first click on the Problem tab.Second, click on Next Problem button to go to the next question.

  • How to use Practice Problems tool: Save your answersFirst, click on File and then Save answers to save your answers.Second, select a directory, type a file name for your answer set and click on Save button.

  • How to use Practice Problems tool: Load your saved answersFirst, click on File and then Load answers.Second, select the saved answer file and click on Open button. The answers you saved will be marked on the problems.

  • How to use Practice Problems tool: Tracking your progressTo see how you are doing or have done on the problem set, click on the Grade tab.The program keeps track of how many problems are in the set, the number you have answered, and the number you have marked correctly.

  • Install SPSS in your computerInsert a SPSS CD included in your text book to your CD-ROM driver in your computer. It will automatically prompt you to installation window.Click on Install SPSS Student Version 11.0.1 button in the installation window.Follow direction and complete the installation.

  • How to start SPSSMethod 1 Double click SPSS icon in your desktop.Method 2Click on Start in the menu bar on your desktop.Click on SPSS and start SPSS.Method 3Double-click on My Computer in your desktop, Local Disk (C:), Program Files, SPSS, and spsswin in order.

  • Open dataset for Class 1You will see the following window if you start SPSS successfully.Click OK.

  • Open dataset for Class 2You will see this Open File window superposed on SPSS main window.First, locate the SW318_Spring_2004 folder under C:\StudentData\. Second, select the GSS2002_PrejucideAndAltruism file and click on Open.

  • Explore SPSS: Data ViewVariable namesThere are two view windows in SPSS. Lets click on variable view.When you open a SPSS data file, you will see a window like this.

  • Explore SPSS: Variable ViewVariable nameVariable labelValue labelMissing values

  • Explore SPSS: Menu barMenu bar provides many varieties using a pop-down method. By clicking Menu bar, you can find almost all of SPSS capabilities. For example, if you want to open an existing SPSS data file, you first click on File in the menu bar, then you will see a pop-down menu bar with a number of options. Then, you click on Open, and Data. For simplicity, this process can be rewritten by:

    File > Open > Data

    This is a convention you will see throughout this semester. In this convention, a Menu (or Command) will be bolded and Italicized.

  • Explore SPSS: Tool barTool bar items provide a quick and easy way to do tasks that you like to do with SPSS.

  • Self-learning MaterialIn the SPSS installation window, click on Access the Pine Forge Documents.Click on SPSS Appendix: How to Use a Statistical Package at the bottom to the right.Review the PDF document. It provides a good warm-up material.

  • Level of Measurement (Nominal): Do Practice ProblemsNote that SPSS variable name is in square brackets (e.g., [marital]) throughout this Practice Problem.

  • Level of Measurement (Nominal): Using SPSS 1Second, click on a cell in Values column and then a gray square button.

    First, find the variable name in square brackets, i.e., [marital]

  • Level of Measurement (Nominal): Using SPSS 2Now, examine values assigned to individual numbers. Variable [marital] is a nominal variable b/c there is no order between categories. In other words, even if we change the numbering scheme for the value label, it would not make any difference in the meaning. Thus, marital status [marital] is a nominal variable.

  • Level of Measurement (Ordinal): Do Practice ProblemsWe are interested in the level of measurement of the variable [givblood], which is frequency of donating blood in the past 12 months. Again, note that the variable name is in square brackets. Lets look at SPSS variable view.

  • Level of Measurement (Ordinal): Using SPSS 1Use scroll bar to find the variable, [givblood].

  • Level of Measurement (Ordinal): Using SPSS 2Variable [givblood] is an ordinal variable b/c numbers are assigned to frequency values that are rank-ordered from less to more frequent. In other words, numbers have meanings (i.e., the larger the number is, the more frequently the respondent donated blood in the past 12 months.)

  • Level of Measurement (Interval): Do Practice ProblemsNow, we are interested in the level of measurement of the variable age [age]. Again, note that the variable name is in square brackets. Lets look at SPSS variable view.

  • Level of Measurement (Interval): Using SPSS In the Value Labels window for [age], there are only two value labels which are for missing values.

    Variable [age] is an interval variable b/c [age] values were measured in a way that has a rank-order and the unit differences were precisely measured and constant (i.e., a year).