Question: Large-Sample Test of 2 = 2 0: When n 30, we can test the null hypothesis that 2 = 2 0, or =

Large-Sample Test of σ2 = σ2 0: When n ≥

30, we can test the null hypothesis that σ2 = σ2 0, or

σ = σ0, by computing which is a value of a random variable whose sampling distribution is approximately the standard normal distribution.

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