A college admissions officer in the U.S.A.,defending the college's use of SAT scores in the admissions process,produced the graph below.It represents the mean GPAs for last year's freshmen,grouped by SAT scores.It shows that increased SAT score is associated with increased GPA.What concerns you about the graph,the statistical methodology,or the conclusion reached?
A)The statistical methodology is a concern because SAT is not an adequate predictor of GPA on average.
B)The conclusion reached is a concern because it should be increased GPA is associated with increased SAT score.
C)The conclusion reached is a concern because there are no relationships between SAT scores and GPA.
D)The statistical methodology is a concern because there may be lurking variables.
E)The statistical methodology is a concern because the GPA data is based on mean GPAs,not individual data.We also don't know the number of students in each SAT category.

Question

A college admissions officer in the U.S.A.,defending the college's use of SAT scores in the admissions process,produced the graph below.It represents the mean GPAs for last year's freshmen,grouped by SAT scores.It shows that increased SAT score is associated with increased GPA.What concerns you about the graph,the statistical methodology,or the conclusion reached? 
A)The statistical methodology is a concern because SAT is not an adequate predictor of GPA on average. 
B)The conclusion reached is a concern because it should be increased GPA is associated with increased SAT score. 
C)The conclusion reached is a concern because there are no relationships between SAT scores and GPA. 
D)The statistical methodology is a concern because there may be lurking variables. 
E)The statistical methodology is a concern because the GPA data is based on mean GPAs,not individual data.We also don't know the number of students in each SAT category.

Quizplus · Accepted Answer

The statistical methodology is a concern because the GPA data is based on mean GPAs, not individual data. We also don't know the number of students in each SAT category. Without knowing the spread of GPAs within each SAT category, it is difficult to determine the strength of the relationship between SAT scores and GPA. Additionally, without knowing the number of students in each SAT category, it is possible that the results are skewed by a small sample size in one or more categories.

A College Admissions Officer in the U