3. About 13% of the United States population is left-handed…
3. About 13% of the United States population is left-handed. Suppose that a researcher speculates that individuals with schizophrenia are more likely to be left-handed than the US population. The researcher surveys 104 individuals with schizophrenia and finds that 22 of them are left-handed. Based on this sample, is there enough evidence that the population proportion of individuals with schizophrenia who are left-handed is more than the 13% (or 0.13). Construct and interpret a 95% confidence interval for the population proportion of individuals with schizophrenia who are left-handed. (b) What is the sample size (n) for the confidence interval?
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