Question

From Cenge DO Chapter 7 Problem Set Social networker Not a social networker Total Every Day 187 98 285 Every Day 306 295 601 493 393 886 Consider the following random experiment: An Internet-using teenager is randomly selected and surveyed. The teen is then categorized as a social networker or not a social networker and as someone who spends time with friends in person every day or someone who does not. When answering the following questions, consider the following definitions. . A simple probability is the probability of a single event. . A joint probability is the probability of two or more events occurring simultaneously. . A conditional probability is the probability of one event occurring given that another occurs. The probability that the randomly selected Internet-using teenager is not a social networker who does not spend time with friends in person every day is 0.33 This probability is considered aJaintprobability because it is the probability of two or more events occurring simultaneously The probability that the randomly selected Internet-using teenager does not spend time with friends in person every day, given that he or she is not a social networker,s probability becauso it is This probability is considered a The orobablity that the rondomly selested internet-using toenager docs not spond time w probabilty because it is ype here to search

Answer 1

a)
not social networker and does not spend time every time
= 295/886
=0.332957
this is joint probability because it is the probability of two or more events occurring simulaneously

b)
P(does not spend time every day| not social networker)
= P( does not spend time every day and not social networker)/ P(not social networker)
= 295/393
= 0.750636

This is conditional
probability of one event given that another occurs