TU Wien:Statistik und Wahrscheinlichkeitstheorie UE (Bura)/Übungen 2019W/12.6

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Cigarettes - yummy (part 2)

In the survey of the previous exercise additionally the smokers were asked how many cigarettes they approximately smoke per day and also those that stopped smoking were asked for the number of cigarettes they smoked before they quit.

The data is given in the file cigarettes.Rdata. Visualize the data. Then test the null hypothesis that there is no difference in the mean cigarette consumption between the two groups. Use a 1%-significance level. Formulate a result.

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