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  3. a political strategist believes that 58% of voters

A political strategist believes that 58% of voters in a certain state support his candidate....

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A political strategist believes that 58% of voters in a certain state support his candidate. He then commisions a poll of 800 voters and 53% of them support his candidate. Is there evidence at the .05 level of significance to refute the strategist's belief? No, because the test value -3.15 is in the noncritical region. No, because the test value -1.69 is in the noncritical region. Yes, because the test value -2.87 is in the critical region. Yes, because the test value -3.15 is in the critical region.

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