Preface to First Edition - lib

CHAPTER 5Analysis of Variance: Weight Gain,Foster Feeding in Rats, WaterHardness and Male Egyptian Skulls5.1 IntroductionThe data in Table 5.1 (from Hand et al., 1994) arise from an experiment tostudy the gain in weight of rats fed on four different diets, distinguished byamount of protein (low and high) and by source of protein (beef and cereal).Ten rats are randomised to each of the four treatments and the weight gainin grams recorded. The question of interest is how diet affects weight gain.Table 5.1:weightgain data. Rat weight gain for diets differingby the amount of protein (type) and source of protein(source).source type weightgain source type weightgainBeef Low 90 Cereal Low 107Beef Low 76 Cereal Low 95Beef Low 90 Cereal Low 97Beef Low 64 Cereal Low 80Beef Low 86 Cereal Low 98Beef Low 51 Cereal Low 74Beef Low 72 Cereal Low 74Beef Low 90 Cereal Low 67Beef Low 95 Cereal Low 89Beef Low 78 Cereal Low 58Beef High 73 Cereal High 98Beef High 102 Cereal High 74Beef High 118 Cereal High 56Beef High 104 Cereal High 111Beef High 81 Cereal High 95Beef High 107 Cereal High 88Beef High 100 Cereal High 82Beef High 87 Cereal High 77Beef High 117 Cereal High 86Beef High 111 Cereal High 9279© 2010 by Taylor and Francis Group, LLC