In a public health survey in a rural county, information was obtained on age and the question: Do you have one person you think of as your personal doctor?
The patients were grouped into three age groups. There were 99 respondents who were 18-34 years old, of whom 70 said yes; 506 respondents who were 35-64 years old, of whom 430 said yes; and 220 respondents who were 65 years old or older, of whom 204 said yes. Test whether the three groups are equally likely to have one person who they think of as their personal doctor.