Practice Techniques For Measuring Correlation (6.3) - Correlation

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6 sample questions

Question 1.
Define correlation.
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What term do we use to describe how two things relate?
Question 2.
What does a positive correlation indicate?
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Think of things that increase together.
3Question 3.
What is the range of the correlation coefficient?
- 0 to 1
- -1 to 1
- -1 to infinity
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Consider what the extremes of a correlation imply.
4Question 4.
Does correlation imply causation?
- True
- False
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Remember the classic saying - correlation does not equal causation.
Question 5.
Using the values provided, calculate the correlation coefficient for height and weight of a group of individuals. Discuss what the value indicates about the height-weight relationship.
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Pay attention to how tightly the points on the scatter plot cluster relative to the line.
Question 6.
Create a scatter diagram for the following data points: (1,2), (2,3), (3,5), (4,4), (5,6). Calculate the correlation and interpret the result.
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Consider drawing it by hand to see the actual relationships before calculating.

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