Study Habits and Exam Scores

Very Hard Data Analysis Logical Analysis

A university conducted a study examining the relationship between student study habits and their final exam scores in a particular course. The data collected from 120 students revealed the following:

70% of students who studied more than 15 hours a week scored above 85% on their final exam.
60% of students who studied between 10 to 15 hours per week scored between 75% and 84% on their final exam.
Only 20% of students who studied less than 10 hours a week scored below 75% on their final exam.

Based on this information, which of the following conclusions can be logically drawn?

Studying more than 15 hours a week guarantees an above-average exam score.

Students who study less than 15 hours per week generally perform poorly on exams.

There is a positive correlation between study hours and exam scores.

The majority of students study more than 15 hours a week.

Hint

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