Datafile Name:
Alcohol and Tobacco
Datafile Subjects:
Consumer , Health
Story Names:
Alcohol and Tobacco
Reference:
Moore, David S., and George P. McCabe (1989). Introduction to the
Practice of Statistics, p. 179. Original source: Family Expenditure
Survey, Department of Employment, 1981 (British official statistics)
Authorization:
contact authors
Description:
Average weekly household spending, in British pounds, on tobacco
products and alcoholic beverages for each of the 11 regions of Great
Britain.
Number of cases:
11
Variable Names:

   1. Region: Region of Great Britain
   2. Alcohol: Average weekly household spending on alcoholic
   beverages in pounds
   3. Tobacco: Average weekly household spending on tobacco products
   in pounds 

The Data:

Region	Alcohol	Tobacco
North	6.47	4.03
Yorkshire	6.13	3.76
Northeast	6.19	3.77
East Midlands	4.89	3.34
West Midlands	5.63	3.47
East Anglia	4.52	2.92
Southeast	5.89	3.20
Southwest	4.79	2.71
Wales		5.27	3.53
Scotland	6.08	4.51
Northern Ireland	4.02	4.56


Abstract:
Data from a British government survey of household spending may be
used to examine the relationship between household spending on tobacco
products and alcholic beverages. A scatterplot of spending on alcohol
vs. spending on tobacco in the 11 regions of Great Britain shows an
overall positive linear relationship with Northern Ireland as an
outlier. Northern Ireland's influence is illustrated by the fact that
the correlation between alcohol and tobacco spending jumps from .224
to .784 when Northern Ireland is eliminated from the dataset.

This dataset may be used to illustrate the effect of a single
influential observation on regression results. In a simple regression
of alcohol spending on tobacco spending, tobacco spending does not
appear to be a significant predictor of tobacco spending. However,
including a dummy variable that takes the value 1 for Northern Ireland
and 0 for all other regions results in significant coefficients for
both tobacco spending and the dummy variable, and a high R-squared.






Region,Alcohol,Tobacco
North,6.47,4.03
Yorkshire,6.13,3.76
Northeast,6.19,3.77
East Midlands,4.89,3.34
West Midlands,5.63,3.47
East Anglia,4.52,2.92
Southeast,5.89,3.20
Southwest,4.79,2.71
Wales,,5.27,3.53
Scotland,6.08,4.51
Northern Ireland,4.02,4.56