A political science professor would like to estimate the difference in the proportion of young voters and older voters in his state who believe that Congress has the same priorities as them. He wants to take a
sample of young voters and a sample of older voters to construct a two-sample z interval.
Which of the following are conditions for this type of interval?
Choose all answers that apply:
А)
The voters within each sample are independent, and the samples are independent of each
other.
B
The study includes an equal number of young and older voters.
С
Both samples include at least 30 voters.