Teen smoking II Suppose that, as reported by theCenters for Disease Control, about 30% of high schoolstudents smoke tobacco. You randomly select 120 highschool students to survey them on their attitudes towardscenes of smoking in the movies.a) What’s the expected number of smokers?b) What’s the standard deviation of the number ofsmokers?c) The number of smokers among 120 randomlyselected students will vary from group to group.Explain why that number can be described with aNormal model.d) Using the 68–95–99.7 Rule, create and interpret amodel for the number of smokers among your groupof 120 students.

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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.