A random sample of n = 11 observations was selected from a normal population. The sample mean and variance were x = 3.91 and s^2 = 0.3217. Find a 90% confidence interval for the population variance σ^2. (Round your answers to three decimal places.)
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We are given a sample of size n = 11, with sample mean x̄ = 3.91 and sample variance s² = 0.3217. Show more…
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