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Question 1 of 3
1. Question
Question 1 of 3
Which of the following graphs most closely corresponds to a correlation coefficient of + 1.0?
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Question 2 of 3
2. Question
Question 2 of 3
A group of investigators describes a linear association between calcium content of the aortic valve cusps as measured in vivo and the diameter of the aortic opening. They report a correlation coefficient of -0.45 and a p value of 0.001. Which of the following is the best interpretation of the results reported by the investigators?
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Question 3 of 3
3. Question
Question 3 of 3
A study is conducted to assess the relationship between plasma homocysteine level and folic acid intake. The investigators demonstrate that the plasma homocysteine level is inversely related to folic acid intake, and the correlation coefficient is -0.8 (p < 0.01). According to the information provided, how much of the variability in plasma homocysteine levels is explained by folic acid intake?
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