Question

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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  • CreatedFebruary 19, 2015
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