After John F. Kennedy Jr. was killed in an airplane crash at night, a survey was taken, asking whether a non instrument-rated pilot should be allowed to y at night. Of 409 New York State residents, 61 said yes. Of 70 aviation experts who were asked the same question, 40 said yes.
(a) At α = .01, did a larger proportion of experts say yes compared with the general public, or is the difference within the realm of chance?
(b) Find the p-value and interpret it.
(c) Is normality of p1 – p2 assured?