MATLAB: An Introduction with Applications
MATLAB: An Introduction with Applications
6th Edition
ISBN: 9781119256830
Author: Amos Gilat
Publisher: John Wiley & Sons Inc
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Estimation
A new framework of data analysis where the new statistical methods are used for interpreting the results and analyzing the data is known as estimation in statistics.
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1 According to eMarketer.com, 36% of mobile phone users in the United States use the Snapchat app at least once a month (March 2017). A sample of 125 was selected. a. Calculate the standard error of the proportion (round standard error to 4 decimal places). b. What is the probability that less than 30% of mobile phone users used Snapchat? c. What is the probability that between 28% and 40% of mobile phone users used Snapchat? d. What impact would changing the sample siİze to 225 Snapchat users have on the results of parts a, b, and c?
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Transcribed Image Text:1 According to eMarketer.com, 36% of mobile phone users in the United States use the Snapchat app at least once a month (March 2017). A sample of 125 was selected. a. Calculate the standard error of the proportion (round standard error to 4 decimal places). b. What is the probability that less than 30% of mobile phone users used Snapchat? c. What is the probability that between 28% and 40% of mobile phone users used Snapchat? d. What impact would changing the sample siİze to 225 Snapchat users have on the results of parts a, b, and c?
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