Citibank offers an opportunity for credit card customers to…

Citibank offers an opportunity for credit card customers to transfer balances from competitive cards and pay low financing for a six-month period. After the introductory period is over, the rate will increase to the normal interest rate. Citibank’s strategy is to penetrate the market and obtain increased market share.

When H&C Research Corporation wanted to test the popularity…

When H&C Research Corporation wanted to test the popularity of a new flavor of ice cream, they selected a number of U.S. cities as test sites, and then randomly selected supermarkets within those cities as trial vendors. This is an example of quota sampling.