A consumer research group is interested in how older drivers view hybrid cars. S

Question

A consumer research group is interested in how older drivers view hybrid cars. Specifically, they wish to assess the percentage of drivers in the country 50 years of age or older who intend to purchase a hybrid in the next two years. They used a list of retired persons who were members of the Association of Retired Persons as the sampling frame. Based on a systematic sample, they estimated the percentage to be 17%.

(a) Define the population of interest.

(b) Define the parameter.

(c) What is the statistic?

(d) How might the results be biased?

Explanation / Answer

(a) Population of interest-All the drivers in the country 50 years of age or older who intend to purchase a hybrid in the next two years.

(b) Parameter- % who intend to purchase a hybrid in the next two years.

(c) Statistic- 17% based on the sample.

(d) Since the sampling frame does not include all the drivers 50 or older (not everyone 50 or older is a member of Association of Retired Persons).

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