Question

Marsha collects survey data indicate that the students who spend more time preparing for the unit tests tend to score better than other students, Marsha can now conclude that:
a. Studying improves exam grades
b. A relationship exist between studying and exam grades
c. Anyone who does not study will do poorly on the exam
d. Better students tend to study more​

Answer 1

Answer:

Marsha collects survey data indicate that the students who spend more time preparing for the unit tests tend to score better than other students, Marsha can now conclude that:

Studying improves exam grades