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FIGURE 3.3

Three normal distributions, all with µ = 0. The solid black line has σ = 0.5,

the dark grey dotted line has σ = 1, and the light grey dashed line has σ = 3.

Notice how increasing σ causes the peak to fall and the width to increase.

flatter p

normal

gets (as shown in Figure 3.3), the more likely values far from

the mean (as measured in x) are to be drawn.

So, how did I generate the height list using the normal distribution? All I

did was create three normally distributed pdfs with different values of µ and

σ: one for the b oys, one for the girls, and one for the adults. I drew 15 random

elements each from the boys’ and girls’ distributions, ...