Weight measurement: in the aspect of weight revaluation, when the big pig has no weighing conditions, the above measured values are used to calculate the weight. Weight (kg) = bust (cm) × body length (cm)/coefficient.

Through random sampling, the pigs of each seed were weighed with an electronic scale on an empty stomach and recorded. At the same time, the body length and chest images were measured with tape measure. Firstly, the scatter diagram and reunion straight line diagram of the product of body length and chest circumference and weight are made by biostatistics.

Although we have made a linear regression diagram, we still can't determine the linear relationship among body length, chest circumference and weight. If there is no linear relationship between them, then the result is not valid.

Therefore, it is necessary to test the significance of linear regression, establish a database of the above-mentioned measured body length, chest circumference and weight in Excel, and then use SAS? (? Statistics? Analysis? System) statistical software package for statistical processing.

After determining the linear relationship between them, the linear regression equation was established and the formula for estimating pig weight was derived.

/iknow-pic . cdn . BCE Bos . com/c 83d 70 cf 3 BC 79 f 3d ce 1ad 4a b5 a 1cd 1 1 738 b29d 3 " target = " _ blank " title = " " class = " ikqb _ img _ alink " >/iknow-pic . cdn . BCE Bos . com/c 83d 70 cf 3 BC 79 f 3d ce 1 / kloc-0/ad 4a b5 a 1cd 1 1738 b29d 3？ x-BCE-process = image % 2f resize % 2Cm _ lfit % 2Cw _ 600% 2Ch _ 800% 2c limit _ 1% 2f quality % 2Cq _ 85% 2f format % 2Cf _ auto " esrc = "/ c 83d 70 cf 3c 79 f 3d ce 1 1 ad 4a b5 a 1cd 165438 b 29d 3

Extended data:

Calculation method of pig weight:

Weight estimation method of pigs Weight (kg) = body length (cm) × chest circumference (cm) ÷ 142 or 156 or 162.

Description:

① Fat pigs are divided by 142, lean pigs by 162 and fat pigs by 156.

② Body length refers to the length from the midpoint of the connecting line between the two ear roots along the dorsal midline to the caudal root.

③ Chest circumference refers to the body circumference starting from the back corner of scapula. After the experiment, I felt that the discrepancy was too big and inaccurate.