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Unformatted text preview: = 0, 0.1, 0.2, and 0.3 are shown in Figure 19.4. The mean percent of the population infected drops from 73 . 6% for = 0 (with a variance of 4 . 5%), to 4 . 1% for = 0 . 3 (with a variance of only 0 . 06%). CHALLENGE 19.5. From Challenge 4, we know that a very low vaccination rate is sucient to dramatically reduce the infection rate: somewhat less than = 0 . 1. But using a nonlinear equation solver on a noisy function is quite dangerous; it is easily fooled by outliers, and by changing the starting guess, you can make it produce almost any value. 109...
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- Fall '11