In many pharmaceutical studies, about 16% of all adult volunteers who take placebos (but who are told they have taken a cold remedy) reported that they suffered side effects of drowsiness, stomach upset, or headaches. A study was run on 250 children aged 8 to 12 to see if the results for children differ from those for adults. Below is a summary of the experiment conducted with 250 children aged 8 to 12 and the output for the goodness-of-fit test.
Choose the correct null and alternative hypotheses.
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H0: The percent of children reporting side effects differs from 12.8%
Ha: The percent of children reporting side effects is 12.8%
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H0: The percent of children reporting side effects is 16%
Ha: The percent of children reporting side effects differs from 16%
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H0: The percent of children reporting side effects differs from 16%
Ha: The percent of children reporting side effects is 16%
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H0: The percent of children reporting side effects is 12.8%
Ha: The percent of children reporting side effects differs from 12.8%
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Survivorship curves. Blue lines are theoretical curves. Red dots are data from field studies.