通过对30头6月龄大通牦牛公牛进行称重和体尺测量，结果实际平均体重是66．69kg，用系数0．000062计算的平均体重是62．65蚝，平均误差为4．04kg，误差率为5．99％。用系数0．000063计算的平均体重是63．66kg，平均误差为3．03kg，误差率为4．47％。用系数0．000064计算的平均体重是64．67kg，平均误差是2，02kg，误差率是3．90％。用系数0．000065计算的平均体重是65．68kg，平均误差是1.01kg，误差率是1．44％。用系数0．000066计算的平均体重是66．69kg，平均误差是1．044kg，误差率是0．02％。用系数0．000067计算的平均体重是67．71kg，平均误差是1．01kg，误差率是1．59％。经非参数检验，实际体重与系数0．000062，0．000063，0．000064计算的体重差异性极显著（P〈0．01）。实际体重与系数0．000065，0．000067计算的体重差异性显著（P〈0．05）。实际体重与系数0．000066计算的体重差异性不显著，所以计算6月龄大通牦牛公牛体重时用系数O．000066计算误差最小。%Body weight and body size of 30 male yaks aged 6 month were measured. The actual average body weight is 66.69kg. The average body weight, average error,error rate were calculated with different coefficient of 0. 000062, 0. 000063, 0.000064, 0. 000065, 0. 000066, 0. 000067 respectively, the average body weight, average error, error rate were 62.65kg,4.04kg,5.99% ;63.66kg,3.03kg,4.47% ;64.67kg,2.02kg,3.90% ;65.68kg, 1. 01kg, 1.44% ;66. 69kg,1.044kg;0. 02% ;67.71kg, 1.01kg, 1.59% respectively. By non -parametric test, there is a very significant difference between actual body weight and body weight calculated with 0.0(O062,0. 000063, and 0.000064 coefficient (P 〈0.01 ). There is a significant difference between actual body weight and body weight calculated with 0. 000065,0. 000067 coefficient ( P 〈 0. 05 ). There is not a significant difference between actual body weight and body weight calculated with coefficient of 0.000066. There is least error in calculating body weight by using picient 0. 000066.
展开▼
