Practice Case 3: Repeated Ranks (6.3.5.3) - Correlation

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6 sample questions

Question 1.
What does a positive correlation indicate?
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Think of two variables that increase together.
Question 2.
What is the range of Pearson's correlation coefficient?
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Consider the extremes of the measurement.
3Question 3.
What does a correlation coefficient of 1 mean?
- No correlation
- Perfect positive correlation
- Perfect negative correlation
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Recall how correlations range.
4Question 4.
True or False: Correlation implies causation.
- True
- False
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Think about examples where correlation appears yet no causation exists.
Question 5.
Two statistics classes were surveyed about their study hours and exam scores. Analyze the data and determine the correlation between study hours and exam scores.
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Remember to find the means, deviations, and then apply the correlation formula.
Question 6.
In a real-world scenario, gather data on local rainfall and crop yields. Analyze the data for correlation.
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Consider external factors that might influence crop yields apart from rainfall.

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