Correlation between Math and Chem?

[Hecatonchires]

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@cherrybarry

“The data so far shows no correlation. r = -0.0437”</p>

<p>You can’t use an xy scatter to plot the scores and then find the r value, because one score does not cause the other.</p>

<p>The appropriate test would probably be a matched-pairs t-test, where you take the difference between the two scores as the X variable.

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<p>First, the r was actually about 0.4 (not including the one person who gave SAT I math instead of IIC).</p>

<p>Second, we are only checking for a correlation, so you can use the linear regression.</p>