Exercise

Choosing the correct correlation test

Think back to our potato growing examples. Here, you've been provided with a DataFrame (podataframe) containing information data on potato Production and Fertilizer used. We are interested in a possible correlation between these two values. The relationship between these two variables is seen below. scipy.stats is loaded into the workspace as stats.

Scatter plot of potato production as a function of fertilizer level

Instructions 1/2

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Question

What type of correlation test is best suited to examining the possible link between Fertilizer and Production?

Possible Answers

Pearson correlation test
Spearman correlation test
Student's t-test
Wilcoxon rank-sum test