It mean circulation, or sometimes referee to as compressions.
Answer: Coupons
Explanation:
Coupons are documents issued to customers in order to enjoy financial discount on products purchase in a store. It is a form of sales promotion which could serve as price discrimination used to help retailers keep their customers.
Answer:
Dr paulin revealed names of participants hence violating confidentiality standard which is part of accepted research principles.
Five problems here include(including the above) :
no random assignment,
no random sampling
experimenter bias since the researcher gave the directions to participants
particupants were not briefed properly
