It is thought that the male voters prefer a candidate more than the female voters. A sample of 400 women reveals that 180 prefer the particular candidate while a survey of 400 men reveals that 230...

It is thought that the male voters prefer a candidate more than the female voters. A sample of 400 women reveals that 180 prefer the particular candidate while a survey of 400 men reveals that 230 prefer the candidate.

1. Set up hypotheses to test that a
   higher percentage of male voters
   than female voters
   in the population prefer the candidate?


2. Also construct a
   95% confidence interval
   containing the difference
   between the percentages
   of males and females who prefer the candidate.