Apoll of 500 randomly selected registered voters was recently administered. respondents were asked, "do you approve of president bush's policies relating to the war in iraq? " suppose that we know that 40% of all registered voters approve of the policies.
a) what is the random variable x?
b) is x binomial? support your answer.
c) what is the probability that at most 185 voters responded yes to the question?
d) how many voters would you expect to respond yes?