A social media survey found that 71%
of parents are? "friends" with their children on a certainonline networking site. A random sample of 140
parents was selected. Complete parts a through d below.
a. Calculate the standard error of the proportion.
sigma Subscript p
equals0.0383
?(Round to four decimal places as? needed.)
b. What is the probability that
105
or more parents from this sample are? "friends" with theirchildren on this online networking? site?
?P(105
or more parents from this sample are? "friends" with their
?children)equals
nothing
?(Round to four decimal places as? needed.)
