The standard deviation of critical dimension thickness in semiconductor manufacturing is sigma = 20nm. (a) State the null and alternative hypotheses used to demonstrate that the standard deviation is reduced. (b) Assume that the previous test does not reject the null hypothesis. Does this result provide strong evidence that the standard deviation has not been reduced? Explain.
Homework Answers
Solution:-
a.)Null Hypotheses (H0): σ =20 nm
Alternative Hypotheses(H1):σ <20 nm
b.)ans:
No, the outcomes does not provide sufficient evidence that σ has not been reduced .
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