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The sponsor of a television special expected that at least 40 percent of the viewing audience would watch the show in a particular metropolitan area.

The sponsor of a television special expected that at least 40 percent of the viewing audience would watch the show in a particular metropolitan area. For a random sample of 100 households with television sets turned on, 30 of them are found to be watching the special. Designating the sponsor's assumption the benefit of doubt, can it be rejected as being true for all viewers in the metropolitan area at the 5 percent level of significance?

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