A store manager wants the nine percentage of shoppers who use coupons he surveys everyone who enters the meat off he finds at 60% of the shoppers use coupons does the sampling method at the store manager use support a valid inference?
Yes, because the sample contains coupon users and non-users
No, because the sample is not chosen randomly
Yes, because The manager asked everyone who entered the meat aisle
No, because not all people who enter the meat aisle use coupons