Answer
$P(p̂ \geq 0.42) = 0.0838$. This implies that about 8 out of 100 samples of 500 adult US citizens have 42% or more individuals who think that marriage is now obsolete.
Work Step by Step
210/500 = Using data from part a for $p̂ \geq 0.42$, we have:
$z = \frac{0.42 - 0.39}{0.022} = 1.36$
$P(p̂ \geq 0.42) = P(z > 1.36) = 0.0838$
