SCH7864_4CORRELATION APPLICATION AND INTERPRETATION
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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 
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