A researcher wished to increase the predictability of student pilot scores on the Federal Aviation Administration (FAA) written general aviation exam. Because for a private pilot's license, the number of hours of ground school is not fixed by the FAA (that is, a few student pilots put in many hours, and a few study on their own and never attend at all), the researcher wanted to know if exam scores could be predicted by number of hours of ground school and students' IQ scores. Do hours of ground school and IQ predict FAA written general aviation exam scores? Question 20 (2 points) What is the INDEPENDENT variable in this problem? Question 20 options: FAA written general aviation exam scores hours of ground school hours of ground school & IQ IQ Question 21 (2 points) What is the DEPENDENT variable in this problem? Question 21 options: IQ FAA written general aviation exam scores predictability hours of ground school Question 22 (2 points) What is the appropriate statistical test for this problem? Question 22 options: simple linear regression multiple regression multiple correlation Pearson correlation coefficient