PreZon: Prediction by Zone and Its Application to Egg Productivity in Chickens

Table 10

Selection of low egg productivity in batch 𝐶 of birds using union set of batches 𝐴 and 𝐵.

Weeks old	Regression				PreZone
	Average egg no.	No. of selected birds	No. of selected birds under average egg no.	Egg improvement^b	Average egg no.	No. of selected birds	No. of selected birds under average egg no.	Egg improvement
Union set
Approach^a
8	82.1	17	9(9/17=53%)	−3.5%	89.9	19	15(15/19=79%)	5.6%
14	82.2	29	17(17/29=59%)	−3.4%	92.4	31	22(22/31=71%)	8.6%
22	83.7	37	21(21/37=57%)	−1.6%	93.2	37	25(25/37=68%)	9.5%

^aSelection approach at continuous three time stages.
^bAverage egg number after birds selected divided by original average egg number (85.1). For example, (82.1−85.1)/85.1=−3.5% and (89.9−85.1)/85.1=5.6%.