the manager of a grocery store will survey customers to determine whether they prefer plastic shopping carts…

the manager of a grocery store will survey customers to determine whether they prefer plastic shopping carts or metal shopping carts. which sample of customers should the manager use so that the results of the survey are valid? every customer with children customers who spend more than $75 every fifth customer who enters the store customers who enter the store before 9 a.m
Answer
Brief Explanations:
A valid sample should be representative of all customers. Sampling every fifth customer who enters the store is a form of systematic random - sampling and is likely to include a diverse cross - section of the store's customer base. The other options (customers with children, customers who spend more than $75, and customers who enter before 9 a.m.) are non - representative subsets that may have different preferences compared to the overall customer population.
Answer:
every fifth customer who enters the store