data fw06p02; title 'CHAPTER 6, EXERCISE 3';
input  SUPPLIER    STRENGTH;
cards;
  1          19
  1          21
  1          19
  1          29
  2          21
  2          71
  2          26
  2          49
  3          19
  3          63
  3          25
  3          83
  4          29
  4          56
  4          35
  4          78