6.27 Public Option, Part III: Exercise 6.13 presents the results of a poll evaluating support for the health care public option plan in 2009. 70% of 819 Democrats and 42% of 783 Independents support the public option.
1. Calculate a 95% confidence interval for the difference between (PD - pI) and interpret it in this context. We have already checked the conditions for you.
The confidence interval is: (___________%, _____________%) (please round to the nearest percent) Interpret the confidence interval in context:
(PICK ONE)
a) We can be 95% confident that the difference in population proportions is contained within our interval
b) 95% of differences in proportions are contained within this interval
c) We can be 95% confident that the difference in sample proportions is contained within our interval