question archive According to a recent? survey, 77?% of teens ages? 12-17 in a certain country used social networks in 2009

Subject:StatisticsPrice:2.87 Bought7

According to a recent? survey, 77?%

of teens ages? 12-17 in a certain country used social networks in 2009. A random sample of 140

teenagers from this age group was selected. Complete parts a through d below.

a. Calculate the standard error of the proportion.

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