% DASL file http://lib.stat.cmu.edu/DASL/Datafiles/Calcium.html
%    
% Calcium and Blood Pressure
% 
% Reference:   Moore, David S., and George P. McCabe (1989).  Introduction to the Practice of Statistics.   Original source:  Lyle, Roseann M., et al., "Blood pressure and metabolic effects of calcium supplementation in normotensive white and black men," JAMA, 257(1987), pp. 1772-1776,
% Authorization:   contact authors
% Description:   Results of a randomized comparative experiment to investigate the effect of calcium on blood pressure in African-American men.  A treatment group of 10 men received a calcium supplement for 12 weeks, and a control group of 11 men received a placebo during the same period.  All subjects had their blood pressure tested before and after the 12-week period.
% Number of cases:   21
% Variable Names:
% 
% Treatment:   Whether subject received calcium or placebo
% Begin:   seated systolic blood pressure before treatment
% End:   seated systolic blood pressure after treatement
% Decrease:   Decrease in blood pressure (Begin - End)
% 

@RELATION relation
@ATTRIBUTE 'Treatment'  {"Calcium","Placebo"}
@ATTRIBUTE 'Begin' numeric
@ATTRIBUTE 'End' numeric
@ATTRIBUTE 'Decrease' numeric
@DATA
'Calcium',107,100,7
'Calcium',110,114,'-4'
'Calcium',123,105,18
'Calcium',129,112,17
'Calcium',112,115,'-3'
'Calcium',111,116,'-5'
'Calcium',107,106,1
'Calcium',112,102,10
'Calcium',136,125,11
'Calcium',102,104,'-2'
'Placebo',123,124,'-1'
'Placebo',109,97,12
'Placebo',112,113,'-1'
'Placebo',102,105,'-3'
'Placebo',98,95,3
'Placebo',114,119,'-5'
'Placebo',119,114,5
'Placebo',112,114,2
'Placebo',110,121,'-11'
'Placebo',117,118,'-1'
'Placebo',130,133,'-3'