A 2017 Pew Research poll found that 28% of cell phone users do not use a screen

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A 2017 Pew Research poll found that 28% of cell phone users do not use a screen lock for security on their smartphones. If 500 smartphone users were surveyed, how many do not use a screen lock on their smartphones?

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Introductory Statistics Exploring The World Through Data

ISBN: 9780135163146

3rd Edition

Authors: Robert Gould, Rebecca Wong, Colleen N. Ryan

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