Does Study Time Per Day Affect Grades?

Comments by the Judges:

Good use of a variety of graphs. Also, a hypothesis was tested.

Question:

Any ideas about why the results are the reverse of what expected results wee? Might consider reanalyzing the data.

Suggestions:

Reverse the X and Y axes. Reverse the order of grades on X axis so it reads from low (F) on the left to high (A) on the right).

Link to 1997 Poster Competition Results Index
Link to 1997 Text-Only Results Index
Link to Pennsylvania Statistics Poster Competition Main Index