According to a recent survey, 71% of teens age 12-17 in a certain country used social networks in 2009. A random sample of 140 teenagers from this age group was selected. a) calculate the standard error of the proportion. b) what is the probability that less than 73% of the teens from this sample used social networks?  c) what is the probability that between 70-80% of the teens from this sample used social networks?  Please help! I am struggling. Thank you!

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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.