Question

QUESTION 3 a) Researchers want to test the effect of three different diets on the weight gain in 2 week- Diet 2 16 old lambs. The following table records the weight gain by the lambs. Diet 3 15 10 17 Diet 1 16 21 18 At the 0.05 level of significance, assess that there is a difference in the weight gain for each of the diet. (16 marks) b) Ten plots, each 10.4 meters, were randomly chosen in a large corm field. For each plot, the plant density (number of plants in the plot) and the mean cob weight (kg of grain per cob) were recorded. The results are given in the table below. Plant Density, X Cob Weight, Y 137 107 132 135 115 103 102 65 149 85 0.21 0.24 0.22 0.23 0.25 0.24 0.24 0.28 0.21 0.25 Calculate the linear regression of Yon X. (9 marks)

Answer 1

Diet 3 Diek 1 8 21 3 each cuet. u mean det ad diet 3 Herewe have ue fctor ( 1.e. diet and du'et were diet, duer 2fdier 3 Tue mode ohames overall men a's ame ue diet mh mean o and all Mea s Atlenat one op t d'e are not 2

Perr e amalyis e We we have 3 el'.e. e and e have 12 dl^ Le-er eut auelt'.e Mare MD

uare s 21 O Mare 2 MS 23, 333 23, 333 2- ew s.256 SiMce eaeh a diet B S MS Treatelt 2 21 o 23. 333

d ) Given 1しっ 6.8 : and = 2.3 2.3 fom 군-table.