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In 2012, the percent of American adults who owned cell phones and used their cell phone to send
or receive text messages was at an all-time high of 80%. Assume that 80% refers to the
population parameter. More recently in 2015, a polling firm contacts a SRS of 1200 people
chosen from the population of cell phone owners to confirm the percent who use their phone to
text. find mean, shape, standard deviation.
Solution

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