data fw09p01; title 'CHAPTER 9, PROBLEM 1';
input  A $  T $   Y;
cards;
 A    C    3.6
 A    C    5.3
 A    M    8.9
 A    M    8.8
 A    N    8.8
 A    N    6.8
 A    Q    8.7
 A    Q    9.0
 B    C    3.8
 B    C    4.8
 B    M    2.5
 B    M    3.9
 B    N    4.1
 B    N    3.4
 B    Q    3.6
 B    Q    3.8