The american council for an energy efficient economy works to a. ban the use of products that are not energy efficient b. fine companies that do not operate at peak energy efficiency c. invest in clean energy technologies that will strengthen the economy d. eliminate the use of energy obtained from the burning of coal within ten years

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: