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(Also, this is a fine way to retroactively prevent the holocaust.)
Wingnuts with computers are the reason we have botnets.
On the other hand, the Bible says nothing directly about public welfare, the environment, corporate power, and so on. Therefore, they perceive any laws related to these fields as restricting freedom -- freedom which only exists in the context of a godly social order.
To accept this world view, one pretty much has to abandon any attempt at critical reasoning, but that's really not too hard.
Assuming the number of erasures over schools is just a normal random variable, even without any sort of interesting effect like excessive erasures at some schools, half will have a number of erasures greater than the average. This is because in a normal distribution the mean and median are the same since the distribution is symmetric. If we look over two years, then the number of schools that had more than the average number of erasures in one of those years can only go up to more than half of all schools. So, even *in the absence of any statistically significant effect*, we would get that over half of schools have more than the DC average of erasures over when considered over multiple years.
To make this statistic interesting, we would need to know if the distribution is unusual, for example, is it bimodal? Can we split the set of DC schools such that these 103 high erasure schools have a distribution of erasures with a statistically significant difference in mean from the remaining schools? These are not difficult tests to run with the data. Hell, they can be done in Excel.