Hi! I have been performing a series of ANOVA tests concerning plant species and three variables. With two of them (DBH and Height) the ANOVA test goes smoothly and I get the right Df (17) according to the number of species (Art) I have (18). However, when performing said analysis on the third variable (Crown_volume) the Df suddendly goes down to 15. I have checked the data and everything seems to be ok, so I am not sure where I am making a mistake. Here is the data:
Art | Ind | DBH | Height | Crown_volume |
---|---|---|---|---|
Acer buergerianum | 1 | NA | NA | NA |
Acer buergerianum | 2 | NA | NA | NA |
Acer buergerianum | 3 | 18 | 371 | 10502268,84 |
Acer buergerianum | 4 | 14,8 | 397 | 14099593,49 |
Acer buergerianum | 5 | 9,8 | 303 | 3558796,158 |
Acer rufinerve | 1 | NA | NA | NA |
Acer rufinerve | 2 | NA | NA | NA |
Acer rufinerve | 3 | 10 | 352 | 5682839,517 |
Acer rufinerve | 4 | 10 | 309 | 2074791,564 |
Acer rufinerve | 5 | 10,2 | 337 | 2853219,581 |
Caprinus japonica | 1 | 11,4 | 251 | 3029877,619 |
Caprinus japonica | 2 | 10 | 293 | 6064027,804 |
Caprinus japonica | 3 | 11,6 | 313 | 7757187,07 |
Caprinus japonica | 4 | 11,2 | 307 | 5746726,946 |
Caprinus japonica | 5 | 9,6 | 270 | 6001262,971 |
Celtis australis | 1 | 12 | 372 | 3464967,257 |
Celtis australis | 2 | 11,8 | 379 | 3032667,353 |
Celtis australis | 3 | 11,8 | 372 | 3621213,321 |
Celtis australis | 4 | 13,2 | 362 | 2779073,805 |
Celtis australis | 5 | 13,7 | 385 | 2952678,215 |
Celtis occidentalis | 1 | 10,4 | 337 | 3310857,477 |
Celtis occidentalis | 2 | 11 | 338 | 5150151,067 |
Celtis occidentalis | 3 | 13 | 318 | 3281632,288 |
Celtis occidentalis | 4 | 11 | 316 | 1980761,602 |
Celtis occidentalis | 5 | 11,2 | 318 | 2208966,892 |
Cladrastis lutea | 1 | 8 | 327 | 2228268,837 |
Cladrastis lutea | 2 | NA | NA | NA |
Cladrastis lutea | 3 | 10,2 | 368 | 5162202,217 |
Cladrastis lutea | 4 | NA | NA | NA |
Cladrastis lutea | 5 | 10,6 | 351 | 4272880,168 |
Cornus controversa | 1 | 12 | 331 | 10735098,56 |
Cornus controversa | 2 | 12,2 | 324 | 12033305,17 |
Cornus controversa | 3 | 12,4 | 332 | 11706830,86 |
Cornus controversa | 4 | 10,2 | 273 | 733172,3271 |
Cornus controversa | 5 | 12 | 301 | 6028716,302 |
Cornus officinalis | 1 | 10,4 | 307 | 2925501,345 |
Cornus officinalis | 2 | 8 | 331 | 620904,3721 |
Cornus officinalis | 3 | 9 | 338 | 1631533,785 |
Cornus officinalis | 4 | 9 | 261 | 980176,9079 |
Cornus officinalis | 5 | 9,4 | 300 | 2559652,408 |
Magnolia denudata | 1 | 9 | 331 | 972863,2802 |
Magnolia denudata | 2 | 8,6 | 301 | 1314777,469 |
Magnolia denudata | 3 | 8,6 | 327 | 2344583,164 |
Magnolia denudata | 4 | 8,2 | 343 | 8846724,913 |
Magnolia denudata | 5 | 8,2 | 310 | 2213758,868 |
Ostrya carpinifolia | 1 | 9,4 | 300 | 9341605,342 |
Ostrya carpinifolia | 2 | 10,4 | 425 | 6664365,216 |
Ostrya carpinifolia | 3 | 11,2 | 374 | 6068853,29 |
Ostrya carpinifolia | 4 | 9,8 | 343 | 7728912,736 |
Ostrya carpinifolia | 5 | 10 | 384 | 1927178,597 |
Ostrya japonica | 1 | 8 | 367 | 3171211,589 |
Ostrya japonica | 2 | 8,2 | 336 | 3857071,531 |
Ostrya japonica | 3 | 10,2 | 372 | 6699383,502 |
Ostrya japonica | 4 | 10,2 | 379 | 7788033,321 |
Ostrya japonica | 5 | 10,4 | 379 | 4045843,55 |
Phellodendrok amurense | 1 | 13 | 325 | 2409090,533 |
Phellodendrok amurense | 2 | 17,8 | 273 | 2381151,302 |
Phellodendrok amurense | 3 | NA | NA | NA |
Phellodendrok amurense | 4 | 13,4 | 341 | 3136076,017 |
Phellodendrok amurense | 5 | NA | NA | NA |
Pterocarya fraxinifolia | 1 | 20,2 | 437 | 18683679,83 |
Pterocarya fraxinifolia | 2 | 21 | 502 | 24881413,82 |
Pterocarya fraxinifolia | 3 | 17,8 | 409 | 16055465,3 |
Pterocarya fraxinifolia | 4 | 22 | 393 | 7465102,729 |
Pterocarya fraxinifolia | 5 | 272 | 565 | 50825942,59 |
Quercus cerris | 1 | 12,8 | 405 | 12750308,77 |
Quercus cerris | 2 | 19,4 | 425 | 34050214,81 |
Quercus cerris | 3 | 12,8 | 384 | 12698317,51 |
Quercus cerris | 4 | 15 | 420 | 21157173,01 |
Quercus cerris | 5 | 18 | 389 | 24367951,91 |
Quercus shumardii | 1 | 13,2 | 383 | 12468981,24 |
Quercus shumardii | 2 | 9 | 432 | 17638291,84 |
Quercus shumardii | 3 | 12,2 | 449 | 12627543,71 |
Quercus shumardii | 4 | 9,2 | 403 | 15666075,37 |
Quercus shumardii | 5 | 8,6 | 409 | 4966229,667 |
Quercus texana | 1 | 11,8 | 412 | 5546184,426 |
Quercus texana | 2 | 13 | 444 | 6665328,638 |
Quercus texana | 3 | 13,6 | 446 | 9092648,785 |
Quercus texana | 4 | NA | NA | NA |
Quercus texana | 5 | 13,8 | 408 | 4222300,526 |
Quercus x hispanica | 1 | 9 | 247 | 1567026,416 |
Quercus x hispanica | 2 | 11,2 | 337 | 3819070,826 |
Quercus x hispanica | 3 | 11,4 | 240 | 1734159,145 |
Quercus x hispanica | 4 | 11,8 | 230 | 2629002,019 |
Quercus x hispanica | 5 | 9,2 | 310 | 6458310,248 |
Zelkova serrata | 1 | 19,4 | 462 | 59232635,09 |
Zelkova serrata | 2 | 12,6 | 444 | 24234245,73 |
Zelkova serrata | 3 | 15,8 | 392 | 31145121,25 |
Zelkova serrata | 4 | 16,6 | 425 | 27416092,66 |
Zelkova serrata | 5 | 12,1 | 374 | 24437066,95 |
Any idea on where the problem could be? I am quite puzzled by this. Thank you.