Sampling Method. In Exercises 9-12, determine whether the sampling method appears to be sound or is flawed. Credit Card Payments In an AARP, Inc. survey of 1019 randomly selected adults, each was...

Sampling Method. In Exercises 9-12, determine whether the sampling method appears to be sound or is flawed.

Credit Card Payments In an AARP, Inc. survey of 1019 randomly selected adults, each was asked how much credit card debt he or she pays off each month.