Spearman's Rank correlation coefficient is a technique which can be used to summarise the strength and direction (negative or positive) of a relationship between two variables. The result will always be between 1 and minus 1. Method - calculating the coefficient. Create a table from your data. Rank the two data sets.
The Pearson correlation evaluates the linear relationship between two continuous variables. A relationship is linear when a change in one variable is associated with a proportional change in the other variable. ... The Spearman correlation evaluates the monotonic relationship between two continuous or ordinal variables.