A recent study showed that 25% of TikTok social media users are under the age of twenty. We took a random sample of 18 people who use TikTok. show calculations    What is the probability that exactly 5 of the TikTok users sampled are under twenty years old?       What is the probability that 1 or fewer of the TikTok users sampled are under twenty years old?       What is the probability that at least 2 of the TikTok users sampled are under twenty years old?       What is the mean and standard deviation for the number of TikTok under twenty years old for this sample?

College Algebra
10th Edition
ISBN:9781337282291
Author:Ron Larson
Publisher:Ron Larson
Chapter8: Sequences, Series,and Probability
Section8.7: Probability
Problem 4ECP: Show that the probability of drawing a club at random from a standard deck of 52 playing cards is...
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  1. A recent study showed that 25% of TikTok social media users are under the age of twenty. We took a random sample of 18 people who use TikTok. show calculations 

 

    1. What is the probability that exactly 5 of the TikTok users sampled are under twenty years old?

 

 

 

    1. What is the probability that 1 or fewer of the TikTok users sampled are under twenty years old?

 

 

 

    1. What is the probability that at least 2 of the TikTok users sampled are under twenty years old?

 

 

 

    1. What is the mean and standard deviation for the number of TikTok under twenty years old for this sample?
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Given information:

The percentage of TikTok users under the age of twenty is 25%. The sample size is 18.

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