Lot conforming non conforming A 88 12 b c 165 260 35 40 A population of...
| Lot | conforming | non conforming |
|---|---|---|
| A | 88 | 12 |
|
b c |
165 260 |
35 40 |
A population of 600 semiconductor wafers contain wafers from three lots. The wafers are categorized by lot and by whether they conform to a thickness specificification with the results shown in the following table.
a.) What is the probability that the wafer is conforming?
b.) What is the probability that the wafer is from Lot A and is conforming?
c.) Given that the wafer is from Lot A, what is the probability that it is conforming?
Homework Answers
Ans:
a)
P(conforming)=(88+165+260)/600=0.855
b)
P(lot A and conforming)=88/600=0.147
c)
P(conforming/lot A)=88/(88+12)=0.88
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Lot
conforming
non conforming
A
88
12
b
c
165
260
35
40
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