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annotate this when testing a new headache treat- ment vs placebo in a sample of 100 individuals, do the observed differences in the sample provide
annotate this when testing a new headache treat- ment vs placebo in a sample of 100 individuals, do the observed differences in the sample provide high con- fidence that the treatment will also work in the popula- tion? Because samples contain random sampling error, researchers require a set of methods to help decide if any observed treatment difference, or observed rela- tionship, is simply due to chance
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