Question

A study was done on children, aged 6 months to 18 years, who had nonlethal scorpion stings. Each child was randomly assigned to receive an experimental antivenom or a placebo. "Good" results were no symptoms after four hours and no detectable plasma venom.
The alternative hypothesis is that the antivenom leads to improvement. The p-value for a one-tailed Fisher's Exact Test with these data is 0.009.
a. Suppose the study had turned out differently, as in the following table.
Would Fisher's Exact Test have led to a p-value larger or smaller than 0.009? Explain.
b. Suppose the study had turned out differently, as in the following table.
Would Fisher's Exact Test have led to a p-value larger or smaller than 0.009? Explain.
c. Try the two tests, and report the p-values. Were you right? Search for a Fisher's Exact Test calculator on the Internet, and use it.


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  • CreatedJuly 16, 2015
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