* Improvement in Angina vs. Disease Duration;

data angina;

 label x_dur='Disease Duration'

       y_impr='Anti-Anginal Response';



pat    x_dur    y_impr

----------------------

  1      1         40

  2      1         90

  3      3         30

  4      2         30

  5      1         80

  6      5         60

  7      1         10

  8      4        -10

  9      2         50

 10      6         40

 11      1         60

 12      4          0

 13      2         50

 14      2        110

 15      3         20

 16      3         70

 17      5        -30

 18      3         20

 19      1         40

 20      6          0