Hi,
I have a large group of dairy cows producing milk, with different contents of fat and protein. I would like to calculate the average milk yield, fat and protein contents for the top 25 % of cows (a top quarter of all cows) according to the milk production. I would like to do the same calculation also for bottom quarter of cows according to milk yield, and for two middle quarters of cows. The number of cows producing milk is not constant but varies from milk control to milk control (monthly). (Eg. having 100 cows the calculations should refer to 25 cow with the highest milk yield, another calculation of the 25 cows with the lowest milk yield and two groups with 25 cows in each producing top middle nad bottom middle quantities of milk). I hope the question is clear
Thanks, Andrej
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