Chapter 5 Working with Scores

Z scores - we already know, are standardized scores with a mean of 0 and a standard deviation of 1. Karl Pearson. may have come up with these out of necessity in coming up with a formula for Galton's "correlations." Z = (X - Xbar) / Scatter plots - Galton's invention, allows us to plot two variables, if there is a strong "linear" relationship ................
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