According to eMarketer.com, 36% of mobile phone users in the United States use the Snapchat app at

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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 size to 225 Snapchat users have on the results of parts a, b, and c?

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Business Statistics

ISBN: 9780134685267

3rd Edition

Authors: Robert A. Donnelly

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Question Posted: Nov 05, 2019 04:29 AM

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According to eMarketer.com, 36% of mobile phone users in the United States use the Snapchat app at

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a b c d The standard error would be re...View the full answer

Business Statistics

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