Consumption of alcoholic beverages by young women of drinking age has been incre

Question

Consumption of alcoholic beverages by young women of drinking age has been increasing in the United Kingdom, the United States, and Europe (The Wall Street Journal, February 15, 2006). Data (annual consumption in liters) consistent with the findings reported in The Wall Street Journal article are shown for a sample of 20 European young women.

Assuming the population is roughly symmetric, construct a 95% confidence interval for the mean annual consumption of alcoholic beverages by European young women (to 1 decimal).

Explanation / Answer

calculate the mean.

subtract the mean from each data point, then square the result.

add these squares.

divide by 1 less than the number of data points.

Take the square root.

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