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Use the sample information xx = 36, = 7, n = 20 to calculate the following confidence intervals for assuming the sample is from a

Use the sample information xx = 36, = 7, n = 20 to calculate the following confidence intervals for assuming the sample is from a normal population.
(a) 90 percent confidence. (Round your answers to 4 decimal places.) The 90% confidence interval is from to (b) 95 percent confidence. (Round your answers to 4 decimal places.) The 95% confidence interval is from to (c) 99 percent confidence. (Round your answers to 4 decimal places.) The 99% confidence interval is from to

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