In the US I want to know what proportion of 13-year-olds vape.Three distributions are associated with this question: populationdistribution, sample distribution, and sampling distribution.Describe the role of each in answering this question.
In cross-sectional analysis explain why it is necessary to takea random sample.
Describe the difference between an estimator and an estimate andexplain why estimators are random variables while estimates arenot.
Explain why point estimates are always wrong.
