Histograms and Descriptive Statistics - due in 48 hours

profilecombs
cf_data_set_instructions.docx

CU_Horiz_RGB

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).

Software Installation

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.

Data Set

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

2