Secondly, the editorial fails to acknowledge possible differences in the types of accidents occurring before and after the change. It is possible that the accidents during the week before the change all involved fatalities, while those during the week after the change were minor fender-benders. If so, even though 3 percent more accidents occurred after the change, the authors argument that changing the speed limit increases danger for drivers would be seriously weakened.
Thirdly, the editorial fails to take into account possible differences between East and West Cambria that are relevant to how drivers react to speed-limit changes. Factors such as the condition of roads, average age and typical driving habits of residents, and weather patterns, would probably affect how well or how quickly drivers adapt to speed-limit changes. Thus, changing speed limits in East Cambria might be more dangerous than changing them in West Cambria.
In conclusion, the statistical evidence cited to support the argument is insignificant and probably unrepresentative. To better evaluate the argument, we need to know how many speed-limit changes contributed to the statistic and when the speed-limit changes were made. Finally, to strengthen the argument the author should show that East and West Cambria would be similarly affected by speed-limit changes.
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