Cyberbullying In 2018, the Pew Research Center did a study on cyberbullying. A sample of 743 teens were asked if they had ever experienced any of the below 6 types of cyberbullying while online or via their cellphone. Those who selected yes to one or more of these questions were considered to be a target of cyberbullying. (Source: Pew Research Center, September 2018, "A Majority of Teens Have Experienced Some Form of Cyberbullying") Offensive name-calling Spreading of false rumors Receiving explicit images they didn't ask for Constant asking of where they are, what they're doing, who they're with, by someone other than a parent Physical threats Having explicit images of them shared without their consent a.) A total of 446 of the sampled teens were considered a target of cyberbullying. Find a 94% confidence level for the proportion of all teens in the U.S. who are a target of cyberbullying. (Round answers to three decimal places.) margin of error: lower limit: upper limit: b.) What conditions were met so the results are valid? (Select all that apply.) The number of trials should be sufficiently large so that nˆp>5np^>5 and nˆq>5nq^>5. σσ is unknown cyberbullying needs to be normally distributed The experiment has to be a binomial experiment cyberbullying needs to be uniformly distributed σσ is known c.) Interpret: We are % confident that the proportion of all teens in the U.S. who are a target of cyberbullying is between % and %.

MATLAB: An Introduction with Applications

6th Edition

ISBN:9781119256830

Author:Amos Gilat

Publisher:Amos Gilat

Chapter1: Starting With Matlab

Section: Chapter Questions

Problem 1P

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Cyberbullying In 2018, the Pew Research Center did a study on cyberbullying. A sample of 743 teens were asked if they had ever experienced any of the below 6 types of cyberbullying while online or via their cellphone. Those who selected yes to one or more of these questions were considered to be a target of cyberbullying. (Source: Pew Research Center, September 2018, "A Majority of Teens Have Experienced Some Form of Cyberbullying")

Offensive name-calling
Spreading of false rumors
Receiving explicit images they didn't ask for
Constant asking of where they are, what they're doing, who they're with, by someone other than a parent
Physical threats
Having explicit images of them shared without their consent

a.) A total of 446 of the sampled teens were considered a target of cyberbullying. Find a 94% confidence level for the proportion of all teens in the U.S. who are a target of cyberbullying. (Round answers to three decimal places.)

margin of error:
lower limit:
upper limit:

b.) What conditions were met so the results are valid? (Select all that apply.)

The number of trials should be sufficiently large so that nˆp>5np^>5 and nˆq>5nq^>5.
σσ is unknown
cyberbullying needs to be normally distributed
The experiment has to be a binomial experiment
cyberbullying needs to be uniformly distributed
σσ is known

c.) Interpret: We are % confident that the proportion of all teens in the U.S. who are a target of cyberbullying is between % and %.

Features Features Normal distribution is characterized by two parameters, mean (µ) and standard deviation (σ). When graphed, the mean represents the center of the bell curve and the graph is perfectly symmetric about the center. The mean, median, and mode are all equal for a normal distribution. The standard deviation measures the data's spread from the center. The higher the standard deviation, the more the data is spread out and the flatter the bell curve looks. Variance is another commonly used measure of the spread of the distribution and is equal to the square of the standard deviation.

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