Determine the confidence interval

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1. A random sample of 30 observations has been drawn from a normal population, and the sample variance is found to be s² = 23.8. Determine the 95% confidence interval for σ².

2. A random sample of 10 observations has been drawn from a normal population, and the sample variance is found to be s² = 19.5. Determine the 98% confidence interval for σ^2.

Reference no: EM131408364

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