Russia recently started a push for stronger smoking regulations much like those in Western countries concerning cigarette advertising, smoking in public places, and so on. The file Russia.xlsx contains sample data on smoking habits of Russians that are consistent with those reported by The Wall Street Journal (October 16, 2012).

(4) Use XLSTAT to compute a 95% confidence interval for the proportion of Russians who smoke.

Hint: Select Describing Data > Descriptive statistics and select cells A1:A301 for Qualitative Data. Click "Outputs" and check "Lower bound on proportions (95%)" and "Upper bound on proportions (95%)" under "Qualitative Data."

(2) Interpret the interval from part (a).

(4) Use XLSTAT to compute a 95% confidence interval for the mean annual per capita consumption of cigarettes of a Russian.

Hint: Select Describing Data > Descriptive statistics and select cells B1:B301 for Quantitative Data. Click "Outputs" and check "Lower bound on mean (95%)" and "Upper bound on mean (95%)" under "Qualitative Data."

(2) Interpret the interval from part (c).

(3) For those Russians who do smoke, estimate the number of cigarettes smoked per day.

Hint: Select Describing Data > Descriptive statistics and select cells B1:B301 for Quantitative Data. Select cells A1:A301 for Subsamples. Note that the data reports annual consumption but this question asks for daily consumption.