A congressional committee wishes to examine the effect of proposed legislation o

Question

A congressional committee wishes to examine the effect of proposed legislation on the nation's high schools. It randomly selects 5 high schools from the 20 in the Washington D.C. area and conducts a study on those 5 schools. Has the committee obtained a random sample of the nation's high schools? During a news broadcast a Topeka television station asked the question "Should liquor by the drink be allowed in Kansas?" It subsequently received 372 phone responses in which 164 persons said "no" and the rest said "yes". Has the television station obtained a random sample of the people in its viewing area? In order to obtain a sample of law firms, a list of all lawyers in the city was obtained and 7 lawyers were selected at random. The law firms to which those lawyers belonged were then selected. Do you have a random sample of law firms?

Explanation / Answer

a. Since the population is nation's high school, and the committee has selected sample from within Washington D.C., this sample would represent Washington D.C. but not the entire nation. Thus, the committee has not obtained a random sample of the nation's high school.

b. Since the population is only the people in T.V. stations viewing area, the phone responses received constitutes a random sample.

c. No, to obtain a random sample of law firm we should directly select firms as random beacause there is a possibility that 2 or more lawyers selected are from same firm.

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