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Exercise

Spearman correlation analysis

A Spearman correlation assesses the strength and direction of a monotonic relationship.

A company is interested in assessing the relationship between the time users spend on their website and the amount the users spent. Perform the Spearman correlation test ignoring groups and run the power analysis of the test to determine if there is a significant monotonic relationship in the rankings of these variables and whether the results found are reliable.

The pwr package and webdata dataset have been loaded for you.

Instructions 1/3

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  • Run the Spearman correlation on the webdata data set, using TimeSearching as x and AmountSpent as y, and store it as rhotest.