Suppose that researchers in three different countries collect sample data on whether or not a person has
Question:
Suppose that researchers in three different countries collect sample data on whether or not a person has donated blood within the past year, with the following sample results: A. 200 blood donors in a sample of 600 people B. 50 blood donors in a sample of 300 people C. 250 blood donors in a sample of 1,000 people
Consider estimating the proportion of people in each country who donated blood in the previous year. a. Explain why an interval of values is better than a single value for this estimate. b. For which of the three countries would a 95% confidence interval be widest? For which would a 95% confidence interval be narrowest? c. For which of the three countries would a 95% confidence interval include the value 0.2? d. What does your answer to part (c) reveal about the p-values for testing whether the proportion of people in the country who donated blood in the previous year differs from 1/5? Explain.
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a It is unlikely that our sample proportion will be the same as the ...View the full answer
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