Question: A confidence interval estimate is desired for the gain in a circuit on a semiconductor device. Assume that gain is normally distributed with standard deviation

A confidence interval estimate is desired for the gain in a circuit on a semiconductor device. Assume that gain is normally distributed with standard deviation σ = 20.
(a) Find a 95% CI for μ when n = 10 and
(b) Find a 95% CI for μ when n = 25 and
(c) Find a 99% CI for μ when n = 10 and
(d) Find a 99% CI for μ when n = 25 and

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