Isis used a municipal parking lot to park her car in an American city. She used an electronic lock to lock her car and kept the keys in her wallet. On returning, she noticed the word "angels" scratched on her car door. Isis spent $200 in repairing the damage. Isis's boyfriend suggested that she sue the city because it was the city's responsibility to prevent vandalism. In this situation, .

Dr. robbins wants to know if there are different opinions regarding the value of public school education between native americans who have at least one relative who attended indian boarding school and native americans who have no family experience with indian boarding school. dr. robbins contacts 35 native american participants in each group. he wants each group to include younger as well as older adults, and a mix of male and female participants. he asks each person to complete a survey about their attitudes toward public education. the design of this study is: