A national television network took an exit poll of 1390 voters after each had cast a vote in a state gubernatorial election. Of them, 630 said they voted for the Republican candidate and 760 said they voted for the Democratic candidate. Treating the sample as a random sample from the population of all voters, a 95% confidence interval for the proportion of all voters voting for the Democratic candidate was (0.521,0.573). Suppose the same proportions resulted from n=139 (instead of 1390), with counts of 63 and 76 and that there are only two candidates. Does a 95% confidence interval using the smaller sample size allow you to predict the winner? Explain. What is the 95% confidence interval for proportion of all voters voting for the Democratic candidate?
A national television network took an exit poll of 1390 voters after each had cast a vote in a state gubernatorial election. Of them, 630 said they voted for the Republican candidate and 760 said they voted for the Democratic candidate. Treating the sample as a random sample from the population of all voters, a 95% confidence interval for the proportion of all voters voting for the Democratic candidate was (0.521,0.573). Suppose the same proportions resulted from n=139 (instead of 1390), with counts of 63 and 76 and that there are only two candidates.
Does a 95% confidence interval using the smaller
What is the 95% confidence interval for proportion of all voters voting for the Democratic candidate?
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