What is a correct assumption historians make when they evaluate a source of information? They know an eyewitness report will be free of bias.
They know an eyewitness report will always be accurate.
They know an expert will provide the most accurate information.
They know a student who did research will be the most accurate source.

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: