In a volunteer group, adults volunteer from 1 to 9 hours each week to spend time with a disabled senior citizen. The program recruits among college students and nonstudents. The contingency table...

In a volunteer group, adults volunteer from 1 to 9 hours each week to spend time with a disabled senior citizen. The program recruits among college students and nonstudents. The contingency table shows the expected number of volunteers (top) and the actual number of volunteers (bottom) from a sample of the adult volunteers and the number of hours they volunteer per week.

Find thetest statistic, χ20, for the chi-square test of independence