Question 4: The percentage of adult smart phone users who use TikTok has increased over time. Assume that 52% of adult smart phone users are in age group 12-21. Of the adult smart phone users in age group 12-21, 81% use TikTok. Of the adult smart phone users in age group 22 and older, 54% use TikTok. What is the probability that a randomly selected adult smart phone user is of age group 22 or older? b. Given that adult smart phone user belong to age group 22 and older, what is the probability that he/she uses TikTok? What is the probability that adult smart phone user belongs to age group 12-21 and do not use TikTok? d. Given that adult smart phone user uses TikTok, what is the probability that he/she belong to age group 12-21?

MATLAB: An Introduction with Applications
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Author:Amos Gilat
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Question 4: The percentage of adult smart phone users who use TikTok has increased over
time. Assume that 52% of adult smart phone users are in age group 12-21. Of the adult smart
phone users in age group 12-21, 81% use TikTok. Of the adult smart phone users in age
group 22 and older, 54% use TikTok.
What is the probability that a randomly selected adult smart phone user is of age group
22 or older?
b. Given that adult smart phone user belong to age group 22 and older, what is the
probability that he/she uses TikTok?
What is the probability that adult smart phone user belongs to age group 12-21 and do
not use TikTok?
d. Given that adult smart phone user uses TikTok, what is the probability that he/she
belong to age group 12-21?
Transcribed Image Text:Question 4: The percentage of adult smart phone users who use TikTok has increased over time. Assume that 52% of adult smart phone users are in age group 12-21. Of the adult smart phone users in age group 12-21, 81% use TikTok. Of the adult smart phone users in age group 22 and older, 54% use TikTok. What is the probability that a randomly selected adult smart phone user is of age group 22 or older? b. Given that adult smart phone user belong to age group 22 and older, what is the probability that he/she uses TikTok? What is the probability that adult smart phone user belongs to age group 12-21 and do not use TikTok? d. Given that adult smart phone user uses TikTok, what is the probability that he/she belong to age group 12-21?
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