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10 30 50 skin 20 40 60 80 100 20 30 40 ●● ● ● 20 30 40 60 100 140 180 ● ● 20 30 40 40 60 80 100 ● ● 20 30 40 20 40 60 80 100 15 25 35 45 0 10 30 50 bmi Fig. 7.3. Physiological data on 200 women. Figure 7.3 displays univariate histograms and bivariate scatterplots for four variables taken from a dataset involving health-related measurements on 200 women of Pima Indian heritage living near Phoenix, Arizona (Smith et al, 1988). The four variables are glu (blood plasma glucose concentration), bp (diastolic blood pressure), skin ( skin fold thickness) and bmi (body mass index). The first ten subjects in this dataset have the following entries:
116 7 The multivariate normal model

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