data fw05p04; title 'CHAPTER 5, EXERCISE 4';
input  A    B   DIFF;
cards;
  2.92    1.84    -1.08
  1.88    0.95    -0.93
  5.35    4.26    -1.09
  3.81    3.18    -0.63
  4.69    3.44    -1.25
  4.86    3.69    -1.17
  5.81    4.95    -0.86
  5.55    4.47    -1.08