Assignment 3: SPSS and Descriptive Statistics
Due at start of class on 30 January, 2006.

SPSS 12.0 is available for download from http://software.udayton.edu or on CD from the Library.   Be sure to install version 12.0 and not versions 11.5 or 13.0.

Each question is worth 1 point unless otherwise indicated.

Name:
Email Address:

Use SPSS and the standard class data set to answer the following questions.  The data set is based on the questionnaire that you answered earlier in the semester.  Each question is worth one point unless otherwise indicated.

1. What is the level of measurement for the GPA variable?
1. Nominal
2. Ordinal
3. Interval
4. Ratio
2. What is the mean GPA in the class?
3. What is the median GPA in the class?
4. Based on the relation between the mean and median, is the GPA distribution
1. positively skewed?
2. not skewed?
3. negatively skewed?
5. What is the value of the skewness measure for GPA?
6. Based on the skewness measure, is the GPA distribution
1. positively skewed?
2. not skewed?
3. negatively skewed?
7. What is the variance of the GPA data?
8. What is the interquartile range of the GPA data?
9. Which is the more appropriate measure of dispersion for the GPA data?
1. Range
2. Interquartile range
3. Standard deviation
10. Why won't SPSS calculate the mean, median, or variance of the PET variable?

Save ALL of your SPSS output to a file named as your last name. Email me the SPSS output file (the .spo file).

When you are all done with the questions, click on the submit button. Your answers are not submitted unless you click on the button, receive confirmation that your answers have been received, and email your SPSS output to me.