Helena gathers data about the music preferences of users of a social mediaapplication. She gathers information on music events (MEs). In her study, amusic event is defined as a posting that has a hashtag or is linked to other video-sharing websites.1. From her data, Helena claims that about 15% of MEs on the application arehip hop/rap. Juan wants more proof of her claim.• Juan uses technology to determine the genres of music of 100 MEs hechooses at random. He determines that 9 were hip hop/rap.• Juan points out the 9% rate to Helena.Part AAssume Helena is correct and 15% of MEs on the app are hip hop/rap.Use random numbers and a simulated sampling distribution to simulate theoutcome of several trials, in which each trial samples 100 MEs from the appand counts the number of hip hop/rap MEs. Make a histogram for your data.Is the model consistent with what you would expect? Explain. 3. Among all users on the app, 20% of MEs are rock music. The app makers wantto know what percentage of MEs from users under 18 years old are rock music.From a sample of 200 MEs from users under 18 years old, 15% of those users'MEs turn out to be rock music.The app makers want to know if the percent of rock MEs coming from all usersunder 18 is really less than it is for users of all age groups combined. Writehypotheses for this situation and run a simulation to test the hypotheses.Make a histogram for your data. Whathypothesis does the simulation support?Show your work.

Part A: To simulate the outcome of several trials, we can use Python and generate random numbers…

Answered: Helena gathers data about the music…

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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Helena gathers data about the music preferences of users of a social media application. She gathers information on music events (MEs). In her study, a music event is defined as a posting that has a hashtag or is linked to other video- sharing websites. 1. From her data, Helena claims that about 15% of MEs on the application are hip hop/rap. Juan wants more proof of her claim. • Juan uses technology to determine the genres of music of 100 MEs he chooses at random. He determines that 9 were hip hop/rap. • Juan points out the 9% rate to Helena. Part A Assume Helena is correct and 15% of MEs on the app are hip hop/rap. Use random numbers and a simulated sampling distribution to simulate the outcome of several trials, in which each trial samples 100 MEs from the app and counts the number of hip hop/rap MEs. Make a histogram for your data. Is the model consistent with what you would expect? Explain.
A researcher is curious to see if the amount of time spent on social media influences how often friends meet in person to socialize. After their sample is selected the researcher asks the subjects on average how much time they spend on social media each day and then asks their subjects to keep track of how many times they meet in person with their friends to socialize and report back at the end of the month. What type of study design is this? The research obtains 100 participates who met with their friends in person at least 15 times in the last month to socialize and 100 participates who met with their friends in persons less than 15 times in the last month to socialize. Then the researcher asks the participants on average how many hours per day did they spend on social media during the month before. What type of study design is this? Options for both questions: Cohort, case-control, cross-sectional, clinical trial
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