Question: For each of the following sample results, construct the requested confidence interval. Assume the data come from normally distributed populations. a. n = 12, x

For each of the following sample results, construct the requested confidence interval. Assume the data come from normally distributed populations.

a. n = 12, x̄ = 28.4, s2 = 44.9;99% confidence for σ2

b. n = 7, x̄ = 28.4, s = 1.24;95% confidence for σ2

c. n = 20, x̄ = 28.4, s = 32;90% confidence for σ2

d. n = 17, x̄ = 28.4, s2 = 18.56;80% confidence for σ2


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