Data management
12-month body weight
The four seasons of birth were March-May, June-August (for the first period) and September-November and December-February (for the second period).
Rains tended to commence in March with the highest rainfall between June and August. Rains ceased in October and the remaining months were dry.
The means and the standard errors in the tables were achieved using the GenStat 'Predict...' button in the dialog box produced during the least squares analysis and then completing the next dialog box that appears
by entering BYYMM and BRTHSEAS.
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Regression analysis
Response variate: CFWT121
Constant + BYYMM + HERD + SEX + BRTHSEAS
BRTHSEAS
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1
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2
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Prediction
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s.e.
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Prediction
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s.e.
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BYYMM
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198703
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75.05
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1.98
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79.19
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2.33
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198803
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64.80
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2.70
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68.95
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3.03
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198903
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73.17
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4.45
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77.32
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4.73
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199003
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71.68
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1.99
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75.83
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2.25
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199103
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74.88
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1.82
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79.03
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2.24
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199203
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65.75
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2.06
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69.90
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2.41
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199303
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53.73
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4.37
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57.87
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4.56
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199403
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63.55
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2.70
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67.69
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3.02
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199503
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74.95
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2.52
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79.09
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2.44
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199603
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71.42
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2.08
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75.57
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2.16
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| 199703
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78.46
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2.30
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82.61
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2.51
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BRTHSEAS
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3
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4
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Prediction
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s.e.
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Prediction
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s.e.
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BYYMM
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198709
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68.31
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1.71
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64.53
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1.69
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198809
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78.66
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2.35
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74.87
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2.45
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198909
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81.27
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1.94
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77.49
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1.89
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199009
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78.67
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1.65
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74.88
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1.54
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199109
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79.31
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1.78
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75.52
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1.75
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199209
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64.72
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1.91
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60.93
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1.89
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199309
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73.90
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2.44
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70.11
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2.36
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199409
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79.27
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1.65
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75.48
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1.68
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199509
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78.62
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1.79
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74.83
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1.85
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199609
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76.58
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1.64
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72.79
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1.65
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| 199709
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75.99
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1.46
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72.20
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1.51
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