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Solution 2 of 3 B8 Tables A hospital director is told that 55 % of the emergency room visitors are insured. The director wants to test the claim that the percentage of insured patients is below the expected percentage. A sample of 320 patients found that 160 were insured. Determine the P-value of the test statistic. 160 — = 0.5. 320 First, we need to calculate the sample proportion. Since 160 of the 320 patients were insured, the sample proportion is}; = Substituting the values into the formula, we can calculate the test statistic. p-p /p(l - p) n 0.5 - 0.55 _ —0.05 \/ 055(1 —055) 0.0278 320 —1.80 Q Continued on the next page ...