Which of the following most logically completes the argument?
Researchers recently asked dozens of shoppers, chosen at random coming out of a FoodBasket supermarket, what they had purchased. The prices of the very same items at the nearest ShopperKing supermarket were totaled and compared with the FoodBasket total. The ShopperKing totals averaged five percent higher than the FoodBasket totals. Nevertheless, this result does not necessarily show that shoppers at ShopperKing would save money overall by shopping at FoodBasket instead, since ______.
Which of the following most logically completes the argument?
Researchers recently asked dozens of shoppers, chosen at random coming out of a FoodBasket supermarket, what they had purchased. The prices of the very same items at the nearest ShopperKing supermarket were totaled and compared with the FoodBasket total. The ShopperKing totals averaged five percent higher than the FoodBasket totals. Nevertheless, this result does not necessarily show that shoppers at ShopperKing would save money overall by shopping at FoodBasket instead, since ______.
A. shoppers who shop regularly at a given supermarket generally choose that store for the low prices offered on the items that they purchase most often
B. for shoppers with more than 20 items, the ShopperKing totals averaged more than five percent higher than the FoodBasket totals
C. many shoppers consider factors other than price in choosing the supermarket at which they shop most regularly
D. there is little variation from month to month in the overall quantity of purchases made at supermarkets by a given shopper
E. none of the people who conducted the research were employees of the FoodBasket supermarket
这个在逻辑笔记里helr有很详细的解释了,看到however,Nevertheless 这种题的结论一般就是和这之后的是反着来的。
原先的结论就是:shoppers at ShopperKing would save money overall by shopping at FoodBasket instead
前提是:抽样的几个人在shopperking买的东西都比foodbasket的价格低。
确定下来是统计枚举类了,那么只要找CQ:样本不具有代表性,或者样本的数量太少。