19 Dec A telemarketing firm has recorded the householdsth
A telemarketing firm has recorded the householdsthat have purchased one or more of the company’sproducts. These number in the millions. The firmwould like to conduct a survey of purchasers toacquire information about their attitude concerningthe timing of the telephone calls. The presidentof the company would like to know the views of allpurchasers but would also like to compare the attitudesof people in the West, South, North, and East.Describe a suitable sampling plan.