Strength of Correlation Assignment

Brett's teacher observed Brett's behavior in class for a week and compared the minutes he stayed on task in class to the grade he earned on the homework that night. She found that the correlation coefficient was r = 0.97. What type of relationship has his teacher discovered?

A

Four students in Ms. Alton's class shared the correlation coefficients derived from their data as follows: Student A: r = -0.87 Student B: r = -0.78 Student C: r = 0.79 Student D: r = 0.86 Whose data had the strongest correlation?

A

Michael surveyed the basketball team and found a positive correlation of r = 0.12 between students missing games due to academic probation and spikes in the team's scoring average. He concluded that students with poor grades did not score as many points as those with good grades, and the students with poor grades caused the team to score fewer points while on the court. Michael does not have a good argument because the information he used shows apositive correlation, which does not imply

A B

Which relationships would most likely be causal? Check all that apply.

ABC

Over five different weeks, Irina tracked the hours she spent exercising and the hours she spent playing video games. What is the strength of the correlation between the hours spent exercising and the hours spent playing video games?

B

Which correlation coefficient represents a moderate negative correlation?

C

Which describes the correlation shown?

C

Claudia records the hours she spent studying and her test scores for 5 tests. What is the correlation coefficient?

D C