U5D3 part1 Ch.Y.U. - Sample Means
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Poslední aktualizace about 1 year ago
3 questions
Every day people watch 1 billion hours of videos on YouTube. That breaks down to every single person on earth watching YouTube videos for about 8.4 minutes per day. For U.S. teens, in any given day, the amount of time spent watching YouTube videos is approximately normal with mean 18.5 minutes and standard deviation 5.3 minutes.
1
Find the probability that a randomly chosen U.S. teen watches YouTube for more than 25 minutes in a given day.
Find the probability that a randomly chosen U.S. teen watches YouTube for more than 25 minutes in a given day.
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1
Find the probability that the mean amount of time spent watching YouTube for the teens in the sample exceeds 25 minutes.
Find the probability that the mean amount of time spent watching YouTube for the teens in the sample exceeds 25 minutes.