The research department at the home office of Superior Insurance conducts ongoing research on the cause of automobile accidents, the characteristics of the drivers, and so on. Specifically, they looked at the proportion of married and single drivers who had at least one accident on their record. Group Number of policies # with at least one Proportion accident Married 600 150 Single 400 120 At the 0.05 level, is there is significant difference in the proportions of single and married persons having at least one accident