# analyze central tendency and variability

This assignment includes four variables that indicate the studentsâ€™ performances on an SPSS exam. You will find the information in the SPSS file named SPSSExam.sav. The four variables measured were:

1. exam (first-year SPSS exam score as a percentage)
2. computer (measure of computer literacy in percent)
3. lecture (percentage of SPSS lectures attended)
4. numeracy (a measure of numerical ability out of 15)

In the data, there is a variable called Uni. This variable indicates the university the students attended. The four universities are World University, Universe University, Planet University, and Cosmos University.

The goal of this assignment is to explore the concepts related to central tendency and variability for both categorical and continuous variables. Furthermore, another goal is for you to explore the various tools for data analysis in the SPSS

software
.

1. Split the file by gender. Calculate the mean and standard deviation of exam and lectures for males and females. Hint: use Explore found under the ANALYSIS => Descriptive tabs, exam and lectures will be the dependent variable and sex will be the factor.
2. Compute the mean, median, and mode for computer (computer literacy).
1. What value is the most representative measure of the central tendency for this variable and why?
3. Calculate the range and the standard deviation for computer (computer literacy).
1. What does the range tell you about the data?
2. What does the standard deviation tell you about the data?

4. Create
a frequency

distribution
table and a graph for Uni (university).

1. What is the most appropriate measure of central tendency?
2. Please provide a rationale for why you selected this measure of central tendency for this variable.

Remember that there are additional resources available in the Supplemental Resources under Course Resources from the course home page.

Length: Please complete the worksheet provided for this assignment. 