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2 cards from this section. Quick, good the night before a test.
What does the Pearson correlation coefficient measure?
Think about how two variables change in relation to one another.
What is Spearman's rank correlation used for?
Consider situations where you are ranking performances.
What range does the Pearson correlation coefficient fall into?
Think about how correlation can be both positive and negative.
Spearman's rank correlation can be used for which type of data?
Consider how you rank items.
You survey 10 students and find their study hours and exam scores as follows: Study Hours: [1, 2, 3, 4, 5, 1, 2, 3, 4, 5] Scores: [55, 60, 65, 70, 75, 50, 55, 60, 65, 70]. Calculate the Pearson correlation coefficient.
Apply the formula for Pearson's coefficient.
In a class of 4, two students have ranks based on their exam results as follows: Student A: [1, 2, 1, 2], Student B: [2, 1, 2, 1]. Calculate Spearman's rank correlation.
Calculate the differences of the ranks and apply the Spearman’s formula.
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