标题: 救护车AA的思路 [打印本页] 作者: girlwithwings 时间: 2010-8-5 17:07 标题: 救护车AA的思路 “A recent review of the West Cambria volunteer ambulance service revealed a longer average response time to accidents than was reported by a commercial ambulance squad located in East Cambria. In order to provide better patient care for accident victims and to raise revenue for our town by collecting service fees for ambulance use, we should disband our volunteer service and hire a commercial ambulance service.”
1 inrepresentative review （West and East） VS ? Unchanged （West and East） 2 correlation but no casual relationship （ response time and better patient care ） VS ? Only one factor? 3 only one factor (raise revenue <--1 disband 2 hire ) VS? correlation but no casual relationship