a store manager wants to know the percentage of shoppers who use coupons he surveys everyone who enters the meat aisle he finds that 60 precent of shoppers use coupons does the sampling method the store manager used supported a valid inference?
No, the sampling method used by the store manager is not valid for making a general inference about all shoppers in the store. The manager only surveyed shoppers in the meat aisle, which may not represent the coupon usage of all shoppers in the store. A more random and representative sample of shoppers should be surveyed in order to make a valid inference about the overall percentage of shoppers using coupons.
