Guide to Spearman's Rank (Correlation Coefficient) for AQA AS GEOG2, section 1

A step-by-step guide to the complicated looking Spearman's ranking which could crop up in the AQA AS GEOG2 paper in section 1. If, like me, Maths was never your strong point, then this is really helpful in explaining this statistical formula. It is based around my river study fieldwork in Shropshire, but it is easy to just put in your own investigation's data or just ignore it altogether to just look at how to use Spearman's rank. I hope you find it useful!

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(Distance) Rank 1 (Hydraulic Rank 2 Difference
Radius) Between
Ranks
1600 10 0.05 7.5 2.5 6.25
1700 9 0.063 10 -1 1
1800 8 0.04 9 -1 1
1900 7 0.09 2 5 25
2000 6 0.05 7.5 -1.5 2.25
2500 5 0.07 4.5 0.5 0.25
2600 4 0.11 1 3 9
2700 3 0.07 4.5 -1.5 2.25
2800 2 0.08 3 -1 1
2900 1 0.06 6 -5 25
Sum 0 73…read more

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7. Compare your calculated Rs with the critical value
in the tables or graph at 95% confidence level.
8. Accept or reject the null hypothesis.…read more

Comments

Georgy1996

Good, although might be more helpful if it says whether your calculated value should be greater than or less than your critical value (greater than) :)

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