1: Which correlation coefficient best describes the relationship between height and weight in healthy individuals across...
1: Which correlation coefficient best describes the relationship between height and weight in healthy individuals across ages 12 to 80?
2: What does a correlation coefficient of 1.0 mean?
that no relationship exists between two sets of scores
that those who did the best on the first test did the worst on the second test
that those who did the best on the first test were average on the second test
that those who did the best on the first test also did the best on the second test
3: The sign (plus or minus) of a correlation coefficient indicates
the direction of the relationship
the importance of the relationship
the magnitude of the relationship
the statistical significance of the relationship
4: Kelly’s T score was 80. What is her z score?
Homework Answers
1. The correlation between height and weight in healthy individuals across ages 12 to 80 is positive and should be high on magnitude. A peaeson correlation coefficient of 0.8 best describes the given association.
2. If the value of the correlation coefficient is 1, then it implies perfect positive correlation. Hence, a correlation coefficient of 1 means that those who did the best on the first test also did the best on the second test.
3. The sign (plus or minus) of a correlation coefficient indicates the direction of the relationship.
4. We know, T = 10Z + 50
Given, T score = 80
Hence, Z score = (80 - 50)/10 = 3.
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