Question: In this exercise, you will use SPSS to get measures of central tendency and dispersion for the rate of traffic fatalities in two different years (1990 and 2009) from the States data set. As an option, you can also get boxplots for these variables.

- Find and click the SPSS icon on your desktop.

- Load the States data set.

- From the menu bar across the top of the SPSS window, click Analyze, Descriptive Statistics, and Frequencies.

- In the list of variables in the Frequencies window, find TrafD thso9 (the rate of traffic fatalities in 2009 ) and TrafDths 90 (the rate of traffic fatalities in 1990 ). Click the arrow to move the variable names into the box on the right.

- Click the Statistics tab and check the appropriate boxes to select the following statistics: Quartiles, Mean, Median, Std. deviation, and Range. Click Continue and then click OK.

- OPTIONAL: To get boxplots for these variables:

- Click Graphs, Legacy Dialogs, and Boxplot.

- On the Boxplot window, check "Summaries of separate variables" and then click Define.

- Find TrafDths09 and TrafDths 90 in the list of variables and click the arrow to move the variable names into the "Boxes Represent" box.

- Click OK.

1. Compute \(Q\) for each variable by subtracting value for the 25 th percentile from the value for the 75th percentile.

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Solution: The downloadable solution consists of 3 pages
Deliverable: Word Document