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 ______.
Premise :
1. For set of Items, Prices at shopper King (5% higher) > Prices at Food basket.
Conclusion:
Shoppers at ShopperKing would not save money overall by shopping at FoodBasket.
Pre- thinking :
what can make this contradictory situation come true ? First thing that comes to my mind is what if the survey is not proper.
Say person X bought , Item A at 100 from food basket and same item A is 105 in shopper king. this "SAMPLE" does not prove that shopper king is overall costly, item A might be outlier etc.
POE
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
This is inline with prethinking, If this is true then the survey is not valid. (if you take same survey outside of Shopperking you will get inverse result) Hence conclusion based on survey is not valid - Correct
B. for shoppers with more than 20 items, the ShopperKing totals averaged more than five percent higher than the FoodBasket totals
This is already stated in the argument, it is just a restatement of the premise. - incorrect
C. many shoppers consider factors other than price in choosing the supermarket at which they shop most regularly
there might be countless other factors, based on which customer choose the shop. But we should focus on only factor that is price. - Out of scope - Incorrect
D. there is little variation from month to month in the overall quantity of purchases made at supermarkets by a given shopper
(Same as C) Quantity is not discussed, we are concerned about the price - Out of scope - incorrect
E. none of the people who conducted the research were employees of the FoodBasket supermarket
(Strong and attractive option)- Argument has not mentioned how shop differentiated price for employees and general customer. So based on this, we will not be able to raise question on conclusion. We need something extra say "Shops gives 20% discount for employees" , to raise the questions on conclusion.
Incorrect.