The Social Media and Personal Responsibility Survey found that 69% of parents are “friends” with their children on Facebook. A random sample of 140 parents was selected.

a. Calculate the standard error of the proportion.

b. What is the probability that 100 or more parents from this sample are “friends” with their children on Facebook?

c. What is the probability that between 96 and 105 parents from this sample are “friends” with their children on Facebook?

d. If 81 parents responded that they are “friends” with their children on Facebook, does this result support the findings of the Social Media and Personal Responsibility Survey?

AppendixLO1