D Question 12 7.5 pts Part 1 Students who are not given laptops in the experiment were told that they were in an experiment while students who were given laptops were not told. Knowing that they were part of an experiment, the students without laptops worked harder to improve their GPAs. I The problem that some subjects know that an experiment is being conducted and change their behavior accordingly is known as: [ Select ] Part 2 Due to the aforementioned problem, we would expect that the OLS estimator B, is: [ Select ]Questions 9-15 Laptop access and GPA. Based on a random sample of 500 high-school students without laptops, a non-profit organization randomly lends laptops to 250 of them for the fall semester. A researcher wants to investigate whether being lent a laptop affects a student's grades, and collects data on the students' GPA for the Fall semester