EXAMPLE 1.19 IQ Scores of Fifth-Grade Students
iq
Figure 1.11 displays a histogram of the IQ scores of 60 fifth-grade students. There is a single peak around 110, and the distribution is approximately sym-IQ metric. The tails decrease smoothly as we move away from the peak. Measures such as this are usually constructed so that they have distributions like the one shown in Figure 1.11.
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Figure 1.11: FIGURE 1.11 Histogram of the IQ scores of 60 fifth-grade students, Example 1.19.