a. An experiment was carried out to investigate the effects on audio sensitivity of varying resistance (A), two capacitances (B, C), and inductance of a coil (D) in part of a television circuit. If four blocks were used with four treatments per block and the defining effects for confounding were AB and CD, which treatments appeared in each block?
b. Suppose two replications of the experiment described in part (a) were performed, resulting in the accompanying data. Obtain the ANOVA table, and test all relevant hypotheses at level .01.

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Treat ment jan Treat- ment r ji/n j 618 598 583 560 477 525 421 462 601 595 550 589 505 48 598 585 587 541 480 508 abd 462 449 603 577 acd 571 552 bd 502 508 abcd 449 455 ad ab ac bc abc452 451