Tag: Correlation

Does Rain Predict Rain? US Weather Data and the Correlation of Rain Today and Tomorrow

During a dreary stretch of June and July in Boston, it seemed to rain every time my family had planned to do something fun. We started to wonder if we were stuck in a rainy pattern and asked, “Does the fact that it has rained a lot for three days straight, make it likely to rain tomorrow?&rdqu...

Pearson, Spearman and Kendall Correlation Coefficients, by Hand

Instatistics, a correlation is used to evaluate the relationship between two variables. In a previous post, we showed how to compute a correlation and perform a correlation test in R. In this post, we illustrate how to compute the Pearson, Spearman, and Kendall correlation coefficients by ha...

A Beginners Guide To The Intraclass Correlation Coefficient (ICC)

Recently I have been working on a lot of projects which require measuring how “similar” two sets of data are to one another. There are many statistical models for measuring correlation but the ICC is ideal for scenarios where you want to quantitatively assess the reproducibility of instr...