Spearman's Rho

Spearman's Rho

1. When to use Spearman's Rank

   • The Hypothesis predicts a correlation
   • The two sets of data are scores from one person/thing
   • The data are ordinal or interval

2. How to use Spearman's Rank

   • Step 1. State the alternative and null hypothesis
   • Step 2. Record the data, rank each co-variable, and calculate the difference
     • Rank A and B seperatly from low to high (lowest number receives rank 1)
     • If there are two or more of the same number, calculate the rank by working out the mean of ranks that would have been given
   • Step 3. Find the observed value
   • Step 4. Find the critical value
     • number of participants (N)
     • one tailed or two tailed
     • look up critical value in table of critical values
   • Step 5. State the conclusion
     • e.g is the observed value greater than the critical value or visa versa

3. if there is an R then the observed value should be greater than the critical value

   • gReateR

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