4.3.10 Spearman's Rank Correlation

Question 1

What is spearmans rank?

Answer 1

Spearman’s rank correlation determines whether there is correlation between variables that don’t show a normal distribution
Method:
Step 1: Create a scatter graph and identify possible linear correlation
Step 2: State a null hypothesis
Step 3: Use the following equation to work out Spearman’s rank correlation coefficient r
Step 4: Refer to a table that relates critical values of rs to levels of probability
If the value calculated for Spearman’s rank is greater than the critical value for the number of samples in the data ( n ) at the 0.05 probability level (p), then the null hypothesis can be rejected, meaning there is a correlation between two variables

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