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question 154

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Use the following to answer questions
Because of the development of optical scanners and cable television, marketing researchers can now test the effectiveness of advertising more precisely.Volunteers in a minimum of six cities are offered food discounts in return for allowing marketing research firms to monitor grocery purchases and send trial commercials to their homes through cable television.
The research subjects shop only at stores equipped with UPC scanners, and their purchases are identified by a special card.Respondents are also told that some of the commercials they see on cable television may differ from those seen by their neighbours.Buying patterns are then compared.For example, Pilgrim Cereals tested a Crunchy Wheat promotion using this system.Half of the 5000 participating homes in one city saw a commercial announcing the promotion; the other half saw a commercial that did not mention the promotion.Pilgrim used scanner data to evaluate the promotion's success before offering the commercials nationwide.
-Suppose that when selecting the 5000 homes to participate in scanner studies in one city, the research firm first divided the city's population into upper-, middle- and lower-class families, and then took a probability sample within each group.This would be a(n) __________ sample.

Definitions:

Substitutes

Products or services that can be used in place of another to satisfy consumer needs or desires.

Skimming Strategy

A pricing approach where a high price is set for a new product to maximize profits from customers willing to pay high prices before lowering the price over time.

Penetration Pricing

A pricing strategy where a product is introduced to the market at a very low price to stimulate demand and gain market share quickly.

Market Prices

The current prices at which goods or services are bought and sold in a marketplace.