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Mathematics, 23.06.2021 16:10 anishivaturi123
Người ta ghi lại sản lượng lúa mì tính bằng tạ/ha của các mảnh ruộng đã bón lót 50và 100 đơn vị đạm. Trên 11 thửa bón 100 đơn vị đạm cho ta năng suất như sau: 47,9 48,9 43,5 53,1 50,8 46,141,1 43,0 41,0 48,5 47,7 Trên 8 thửa bón 50 đơn vị đạm cho ta năng suất như sau: 47,2 43,1 35,7 47,045,7 42,6 40,7 42,3 Với mức ý nghĩa 5%, có thể kết luận rằng bón lót 100 đơn vị đạm cho năng suất trung bình cao hơn bón lót 50 đơn vị đạm hay không
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Người ta ghi lại sản lượng lúa mì tính bằng tạ/ha của các mảnh ruộng đã bón lót 50và 100 đơn vị đạm....
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