February 2015
Beginner to intermediate
576 pages
16h 15m
English
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Statistics • 253
With this background in mind, let us dig into correlations a little bit
deeper. ink back to Figure 6.26. We notice a positive correlation coef-
cient, which we can see by the upward trend from le to right on the plot.
If we had a negative correlation coecient, there would be a downward
trend from le to right, as we can see with the example scatter plot in
Figure6.28.
e most common calculation measuring correlation is the Pearson
correlation coecient. is is a stand-alone number—it has no units—
that varies between –1 and +1. A value of one means there is a perfect,
lock-step movement between one variable and the other. I ...
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