Histograms and Descriptive Statistics

spss_data_set.docx

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Your SPSS Data Set

The grades.sav file is a sample SPSS data set from the George and Mallery text. 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 grades.dat to grades.sav. There are 21 variables in grades.sav. Open your grades.sav file and navigate 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