Question

a teacher compares students’ grades on a test with how long students reported that they studied for the test and puts together this scatter plot with the data. which is the best conclusion based upon this data? a studying longer tended to yield better test scores. b only students who studied at least 1 hour passed the test. c generally, studying about 1.5 hours produces the best results. d it was not necessary to study to reach a passing score.

Explanation:

• Option A: Analyzing the scatter plot, as study hours increase (x - axis, more to the right), test scores (y - axis, higher up) generally increase. This shows a positive trend where longer study is associated with better scores.
• Option B: There are likely students who studied less than 1 hour and passed (since the "Pass" group has points with low x - values), so this is incorrect.
• Option C: The plot doesn't show a peak at 1.5 hours; the trend is more of a general increase with more study, not a specific optimal 1.5 - hour mark.
• Option D: The "Fail" group has points, meaning some students who studied still failed, so studying was necessary for many to pass, and this statement is incorrect.

Answer:

A. Studying longer tended to yield better test scores.