Data Set Instructions
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).
Last week, you converted grades2.dat to grades.sav. 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 |
Nominal |
| year | Class rank | 1 = freshman; 2 = sophomore;
3 = junior; 4 = senior |
Scale |
| lowup | Lower or upper division | 1 = lower; 2 = upper | Ordinal |
| section | Class section | Nominal | |
| 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 | |
| percent | Final percent | Scale | |
| grade | Final grade | Nominal | |
| passfail | Passed or failed the course? | Nominal |
