The grades.sav file is a sample SPSS data set. The fictional data represent a teacher’s recording of student demographics and performance on quizzes and a final exam across three sections of the course. Each section consists of about 35 students (N = 105).
Make sure that IBM SPSS Statistics Standard GradPack is fully licensed, installed on your computer, and running properly. It is important that you have either the Standard or Premium version of SPSS that includes the full range of statistics. Proper software installation is required in order to complete your first SPSS data assignment in Assessment 1.
Next, click grades.sav in the Assessment 1 Resources to download the file to your computer.
· You will use grades.sav throughout the course.
The definition of variables in the grades.sav data set are found in the Assessment 1 Context. Understanding these variable definitions is necessary for interpreting SPSS output.
In Assessment 1, you will define values and scales of measurement for all variables in your grades.sav file.
Verify the values and scales of measurement assigned in the grades.sav file using information in the Data Set on page 2 of this document.
There are 21 variables in grades.sav,. Open your grades.sav file and go to the Variable View tab. Make sure you have the following values and scales of measurement assigned.
|SPSS variable||Definition||Values||Scale of measurement|
|id||Student identification number||Nominal|
|lastname||Student last name||Nominal|
|firstname||Student first name||Nominal|
|gender||Student gender||1 = female; 2 = male||Nominal|
|ethnicity||Student ethnicity||1 = Native; 2 = Asian; 3 = Black;
4 = White; 5 = Hispanic
|year||Class rank||1 = freshman; 2 = sophomore;
3 = junior; 4 = senior
|lowup||Lower or upper division||1 = lower; 2 = upper||Ordinal|
|gpa||Previous grade point average||Scale|
|extcr||Did extra credit project?||1 = no; 2 = yes||Nominal|
|review||Attended review sessions?||1 = no; 2 = yes||Nominal|
|quiz1||Quiz 1: number of correct answers||Scale|
|quiz2||Quiz 2: number of correct answers||Scale|
|quiz3||Quiz 3: number of correct answers||Scale|
|quiz4||Quiz 4: number of correct answers||Scale|
|quiz5||Quiz 5: number of correct answers||Scale|
|final||Final exam: number of correct answers||Scale|
|total||Total number of points earned||Scale|
|passfail||Passed or failed the course?||Nominal|