Example 6.3.1.-- Randomized completel block design

y1={58 4, 62 6, 60 7, 54 6, 58 6};
y2={49 7, 55 6, 48 4, 52 4, 49 7};
y3={54 6, 52 6, 51 7, 58 5, 61 6};
y4={58 4, 55 4, 51 5, 49 6, 52 4};