Strength of Correlation

Question 1

Which correlation coefficient represents a moderate negative correlation?

Revolt · Accepted Answer

r = –0.64

Question 2

strong negative correlationmoderate negative correlation✔ strong positive correlationmoderate positive correlation

Revolt · Accepted Answer

strong positive correlation

Question 3

Which describes the correlation shown?

Revolt · Accepted Answer

strong positive

Question 4

Whose data had the strongest correlation?

Revolt · Accepted Answer

Student A

Question 5

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?

Revolt · Accepted Answer

moderate negative correlation

Question 6

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

Revolt · Accepted Answer

0.85; Selection 1: 0.85; Selection 2: strong positive correlation

Question 7

Question 7

Revolt · Accepted Answer

Michael does not have a good argument because the information he used shows apositive correlation, which does not imply.: weak; Michael does not have a good argument because the information he used shows apositive correlation, which does not imply.: a causation between variables

Question 8

✔ weakmoderatestrongperfect

Revolt · Accepted Answer

✔ weak; Michael does not have a good argument because the information he used shows apositive correlation, which does not imply.: weak; Michael does not have a good argument because the information he used shows apositive correlation, which does not imply.: a causation between variables

Question 9

Which relationships would most likely be causal? Check all that apply.a positive correlation between time spent exercising and the number of calories burneda negative correlation between temperature and coat salesa positive correlation between time spent practicing free throws and free throw percentagea positive correlation between time spent on the phone with friends and the number of friendsa negative correlation between temperature and the number of speeding tickets

Revolt · Accepted Answer

a positive correlation between time spent exercising and the number of calories burned; a negative correlation between temperature and coat sales; a positive correlation between time spent practicing free throws and free throw percentage

Question 10

Hope researches the impact of one variable on another. She graphs the data from her research and sees that the data forms a shape that is similar to an arch. What conclusion can Hope draw from her graph?

Revolt · Accepted Answer

Because the graph shows a pattern that is an arch shape, Hope can conclude that there is an association between the variables. However, because the relationship is not linear, there is no correlation. The pattern shows that as one variable changes, the other variable changes in the same way. This does not imply that a change in one variable causes the change in the other variable to happen. Hope cannot conclude that there is a causal relationship.

Strength of Correlation Answers

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