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What is the typical murder rate in large cities versus small ones? Explore this question by using the following data for selected US cities grouped by population size – the top ten in size and the bottom 10 in size (all are among the largest US cities).
Murder Rate per 100,000 in 2001

Top 10 by Population
Murder Rate
Bottom 10 by Population
Murder Rate
New York
8.2

Aurora, CO

6.9

Los Angeles

15.6

Corpus Christi, TX

6.7

Chicago
22.9

Raleigh, NC

3.6

Houston
13.4

Newark, NJ

32.6

Philadelphia

20.4

Anchorage, AK

3.8

Phoenix
15.3

Lexington, KY

9.2

San Diego

4

Riverside, CA

7.7

Dallas
19.7

Louisville, KY

9.7

San Antonio

8.5

Mobile, AL

16.4

Las Vegas
11.9

St. Petersburg, FL

8.2
1. Calculate the mode, median and mean for each group of cities. (3 pts)
2. Examine your findings. Do the 3 measures of central tendency look the same for the two groups? Describe and explain any patterns that you see. (3 pts)
3. Which is the single best measure of central tendency to describe what is typical for each group? Justify your answer. (2 pts)
4. What do the findings seem to indicate about the link between murder rate and population size? (2 pts)