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A biopharmaceutical company is testing a new antiviral drug. 500 subjects are randomly assigned into two groups. One group is treated with the drug, one

A biopharmaceutical company is testing a new antiviral drug. 500 subjects are randomly assigned into two groups. One group is treated with the drug, one group is given a placebo. Of the treated group, 198 showed improvements. Of the control group, 162 showed improvements. Determine whether there is a statistically significant difference between these proportions, using an alpha level of .05.

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