# GCSE maths coursework

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1. Dec 12, 2005

### joshd

right:

i am doing my GCSE maths coursework, about handling data. one of my hypothesis' is:

"i think that people who are good at estimating the size of angles will also be good at estimating the length of lines"

SO, i have collected my data. my teacher said that because the two estimates are of different actual numbers, i need to work out the percentage difference between the estimate and the actual measurement.

i am trying to work out spearmans for the two data sets, so i worked it out, and i got 0.17. i then drew a scatter graph, and bingo, no correlation. i then remembered that i had left out the 1- part of the spearmans formula, so i re did the calculation, and got 0.83.

but there is still no correlation on the graph, as it hasnt changed, so basically it says no correlation, and spearmans says there is.

Last edited: Dec 12, 2005