11-16. Suppose a random sample of size n = 15 is taken from a normally distributed population....

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11-16. Suppose a random sample of size n = 15 is taken from a normally distributed population. It is determined that 15 i=1(xi − ¯x) = 131.43. Find a 95% confidence interval for σ2. What is the 95% confidence interval for σ?

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