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. Author manuscript; available in PMC: 2010 Dec 1.
Published in final edited form as: J Am Stat Assoc. 2010 Sep 1;105(491):1042–1055. doi: 10.1198/jasa.2010.tm09129

Figure 2.

Figure 2

Comparison of exact formula for standard deviation of yk from (2.12) (heavy curve) with rms approxmation from (2.23) (dotted curve); N = 6000, α = .10 in (2.22), two classes as in (2.24). Dashed curve is standard deviation from (2.13) ignoring the correlation penalty. Hash marks indicate bin midpoints xk.