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30 August, 18:42

A radio station wants to know if residents in their area are in favor of a proposed tax increase. They invite listeners to call in to respond to the poll. A total of 645 of the 800 who responded were against the tax. The station calculated a 95% confidence interval and declared, "Between 77.9% and 83.4% of residents oppose the new tax."a. Because of the way the poll was conducted, the results are invalid. b. This is a valid interval, so the station must be right. c. We can't say for certain that between 77.9% and 83.4% of residents oppose the new tax because it is a 95% confidence interval.

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  1. 30 August, 21:03
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    Option a.

    Step-by-step explanation:

    This poll is terribly biased mechanism. Polling is not conducted in a valid form. The participants are only those who want to respond. So we cannot infer anything about the population on the basis of this polling.

    Hence the answer is Option a. Because of the way the poll was conducted, the results are invalid.
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