JOURNAL PROBLEM The graph shown in Figure 14.42 is from the February 1991 issue of Scientific American.
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JOURNAL PROBLEM The graph shown in Figure 14.42 is from the February 1991 issue of Scientific American. If the curve in the middle is a standard normal curve, describe the variance of the upper curve (labeled
a) and then describe the variance of the lower curve (labeled b).
Figure 14.42
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