Integrated circuits are manufactured on silicon wafers through a process that involves a series of steps. An experiment was carried out to study the effect of the cleansing and etching steps on the yield (coded to maintain confidentiality). The results (stored in Yield) are as follows:

At the 0.05 level of significance,
a. Is there an interaction between the cleansing step and the etching step?
b. Is there an effect due to the cleansing step?
c. Is there an effect due to the etching step?
d. Plot the mean yield for each cleansing step for each etching step.
e. Discuss the results of (a) through (d).

Transcribed Image Text:

ETCHING STEP CLEANSING STEP New Standard 38 34 19 28 20 35 37 29 32 30 New 1 New 1 ew New 2 38 29 35 34 31 23 38 Standard Standard Standard