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6. An attorney claims that more than 20% of all lawyers advertise. A sample of 150 lawyers in a certain city showed that 60 had

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6. An attorney claims that more than 20% of all lawyers advertise. A sample of 150 lawyers in a certain city showed that 60 had used some form of advertising. At a = 0.05, is there enough evidence to support the attorney's claim? P H A N T O M S

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