WANG Haixian, CENG Jianjun, CHEN Guijing. Two-Stage Confidence Intervals for the Variance of a Normal Distribution[J]. Chinese Journal of Applied Probability and Statistics, 2003, 19(2): 118-124.
Citation:
WANG Haixian, CENG Jianjun, CHEN Guijing. Two-Stage Confidence Intervals for the Variance of a Normal Distribution[J]. Chinese Journal of Applied Probability and Statistics, 2003, 19(2): 118-124.
WANG Haixian, CENG Jianjun, CHEN Guijing. Two-Stage Confidence Intervals for the Variance of a Normal Distribution[J]. Chinese Journal of Applied Probability and Statistics, 2003, 19(2): 118-124.
Citation:
WANG Haixian, CENG Jianjun, CHEN Guijing. Two-Stage Confidence Intervals for the Variance of a Normal Distribution[J]. Chinese Journal of Applied Probability and Statistics, 2003, 19(2): 118-124.
Two-Stage Confidence Intervals for the Variance of a Normal Distribution
In this paper, we concretely design a fixed-width confidence interval for the variance σ2 of a normal distribution N（μ,σ2） by two-stage procedures and provide the optimal sample size of the first stage by numerical computations. Moreover, for fixed samples, we establish a proof for the non-existence of fixed-width confidence interval for σ2.
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