Q1) If you have multiple regression output with 2 independent variables and R-Square is .9682, what does R-Square indicate?

Q2) A researcher wishes to gather data about study habits of sophomores at Harmond University. From sophomore class of 2,300 students, she wishes to gather a sample of 70 students. Which of the given sampling methods will yield the most representative sample?

a) Randomly choosing 70 sophomores entering university's main library on arbitrarily selected evening.

b) Choosing 70 sophomores whose grade point averages (GPA) fall closest to mean GPA of the sophomore class.

c) Assigning each sophomore number and then arbitrarily generating 70 numbers from that list.

d) Arbitrarily choosing 70 sophomores who are members of college fraternities.