A researcher conducts an experiment to understand why different people have different intelligence levels. They want to find out if there is a greater genetic influence or environmental influence. What is the goal of science that the researcher is trying to achieve?

Why did the athenians choose officials by lottery? would there be drawbacks to this method? explain.

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:

What percentage of people are left handed?