Question: A social psychologist suspects that people who serve on juries tend to be much older than citizens in the general population. Jurors are selected from the list of registered voters, so the ages for the jurors’ should have the same distribution as the ages for voters. The psychologist obtains voter registration records and finds that 20% of the registered voters are between 18 and 29 years old, 45% are between 30 and 49 years old, and 35 % are age 50 or older. The psychologist also monitors jury composition over several weeks and observes the following distribution of ages for actual juries:

Age Categories for Jurors:

Q: do the data indicate that the distribution of accidents for the three age groups is significantly different from the distribution of drivers? Test with .