Reference no: EM132495774
Use the sample information x<br/>¯<br/>x¯ = 43, σ = 3, n = 11 to calculate the following confidence intervals for μ 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
(d) Describe how the intervals change as you increase the confidence level.
-The interval gets narrower as the confidence level increases.
-The interval gets wider as the confidence level decreases.
-The interval gets wider as the confidence level increases.
-The interval stays the same as the confidence level increases.
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