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A hospital director is told that 30% of the treated patients are uninsured. The director wants to test the claim that the percentage of uninsured

A hospital director is told that 30% of the treated patients are uninsured. The director wants to test the claim that the percentage of uninsured patients is below the expected percentage. A sample of 160 patients found that 40 were uninsured. Find the value of the test statistic. Round your answer to two decimal places.

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