Reanalyze the data of Example 17.4.1 assuming that the Disk-by-Window interaction is a random effect. Include estimates of both variance components.

Table 19.22: Snedecor and Haber (1946) cutting dates on asparagus.
Treatments Year a b c a b c a b c 29 201 301 362 185 236 341 209 226 357 30 230 296 353 216 256 328 219 212 354 31 324 543 594 317 397 487 357 358 560 32 512 778 755 448 639 622 496 545 685 33 399 644 580 361 483 445 344 415 520 34 891 1147 961 783 998 802 841 833 871 35 449 585 535 409 525 478 418 451 538 36 595 807 548 566 843 510 622 719 578 37 632 804 565 629 841 576 636 735 634 38 527 749 353 527 823 299 530 731 413 29 219 330 427 225 307 382 219 342 464 30 222 301 391 239 297 321 216 287 364 31 348 521 599 347 463 502 356 557 584 32 487 742 802 512 711 684 508 768 819 33 372 534 573 405 577 467 377 529 612 34 773 1051 880 786 1066 763 780 969 1028 35 382 570 540 415 610 468 407 526 651 36 505 737 577 549 779 548 595 772 660 37 534 791 524 559 741 621 626 826 673 38 434 614 343 433 706 352 518 722 424 Blocks are indicated by vertical and horizontal lines.