Difference in hemorrhaging rates

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Reference no: EM13107827

The drug Ancrod was tested in a double-blind clinical trial in which subjects who had strokes were randomly assigned to get either Ancrod or a placebo. One response variable in the study was whether or not a subject experienced intracranial hemorrhaging. The data are provided in the following table. Use a chi-square test to determine whether the difference in hemorrhaging rates is statistically significant. Use a nondirectional alternative and let alpha = .05.

Treatment

Ancrod Placebo

Hemorrhage? Yes 13 5

No 235 247

Total 248 252

Reference no: EM13107827

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