Chapter 10, Problem 3SE

Crime and Gender A statistics student conducted a study in Ventura County, California, that looked at criminals on probation who were under $15$ years of age to see whether there was an association between the type of crime (violent or nonviolent) and gender. Violent crimes involve physical contact such as hitting or fighting; nonviolent crimes include vandalism, robbery, and verbal assault. The raw data are shown in the accompanying table; v stands for violent, n for nonviolent, b for boy, and g for girl.

Create a two-way table to summarize these data. Notice that the two variables are categorical, as can be seen from the raw data. If you are doing this by hand, create a table with two rows and two columns. Label the columns Boy and Girl (across the top). Label the rows Violent and Nonviolent. Begin with a big table, making a tally mark in one of the four cells for each observation, and then summarize the tally marks as counts.