Question 1
An association between two numerical variables is modelled by the equation y = 3.2x + 12, with a correlation coefficient of r = 0.68. Which statement best describes this association?
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General Mathematics · Unit 3 · Bivariate data analysis 1 · Identifying and describing associations between two numerical variables
Describe an association between two numerical variables in terms of direction (positive/negative), form (linear/non-linear) and strength (strong/moderate/weak).
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Question 2
A researcher collects data on the number of hours spent exercising per week and resting heart rate (in beats per minute) for a sample of adults. The correlation coefficient for this data is r = -0.862. Describe the association between hours of exercise and resting heart rate in terms of direction, form and strength.
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