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The number of hours spent on social media per week by teens is normally distributed with a mean of 31 hours and a standard deviation of 5.5 hours. 38. What is the probability that a randomly selected teen spends less than 31 hours per week on social media? 39. What is the probability that a randomly selected teen spends at least 25.5 hours per week on social media? 40. What is the probability that a randomly selected teen spends between 31 and 42 hours per week on social media?

The number of hours spent on social media per week by teens is normally distributed with a mean of 31 hours and a standard deviation of 5.5 hours. 38. What is the probability that a randomly selected teen spends less than 31 hours per week on social media? 39. What is the probability that a randomly selected teen spends at least 25.5 hours per week on social media? 40. What is the probability that a randomly selected teen spends between 31 and 42 hours per week on social media?

A First Course in Probability (10th Edition)
A First Course in Probability (10th Edition)
10th Edition
ISBN:9780134753119
Author:Sheldon Ross
Publisher:Sheldon Ross
Chapter1: Combinatorial Analysis
Section: Chapter Questions
Problem 1.1P: a. How many different 7-place license plates are possible if the first 2 places are for letters and...
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The number of hours spent on social media per week by teens is normally distributed with a mean of 31 hours and a standard deviation of 5.5 hours. 38. What is the probability that a randomly selected teen spends less than 31 hours per week on social media? 39. What is the probability that a randomly selected teen spends at least 25.5 hours per week on social media? 40. What is the probability that a randomly selected teen spends between 31 and 42 hours per week on social media? 41. What is the probability that a randomly selected teen spends between 14.5 and 36.5 hours per week on social media? Choices for 38-41: A) 0.475 AC) 0.003 CD) 0.95 B) 0.025 AD) 0.815 CE) 0.0235 GSE Algebra IIB Week 13 C) 0.0015 AE) 0.027 DE) 0.5 D) 0.8385 BC) 0.997 ABC) 0.16 Page 18 of 21 E) 0.4985 BD) 0.975 ABD) 0.34 AB) 0.84 BE) 0.135 ABE) 0.68
Transcribed Image Text:The number of hours spent on social media per week by teens is normally distributed with a mean of 31 hours and a standard deviation of 5.5 hours. 38. What is the probability that a randomly selected teen spends less than 31 hours per week on social media? 39. What is the probability that a randomly selected teen spends at least 25.5 hours per week on social media? 40. What is the probability that a randomly selected teen spends between 31 and 42 hours per week on social media? 41. What is the probability that a randomly selected teen spends between 14.5 and 36.5 hours per week on social media? Choices for 38-41: A) 0.475 AC) 0.003 CD) 0.95 B) 0.025 AD) 0.815 CE) 0.0235 GSE Algebra IIB Week 13 C) 0.0015 AE) 0.027 DE) 0.5 D) 0.8385 BC) 0.997 ABC) 0.16 Page 18 of 21 E) 0.4985 BD) 0.975 ABD) 0.34 AB) 0.84 BE) 0.135 ABE) 0.68
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