When the 2000 General Social Survey asked subjects whether they would be wiling to
accept cuts in their standard of living to protect the environment, 344 of 1170 subjects
said “yes”.
(a) Estimate the population proportion who would say “yes”.
(b) Conduct a test to check if less than 50% of the population would say “yes”. Write
out the null and alternative hypothesis. What is the test statistic and p-value?
What is the result of the test?
(c) Construct an approximate 95% confidence interval for the population proportion
who would say “yes”. Interpret the confidence interval.
(d) Estimate the odds of answering “yes” against “no”.
(e) Construct an approximation 95% confidence interval for the odds.
