Section Exercise 842 Use the sample infom’lation I = 42. o = 7. r1 = 16 to calculate the following confidence intervals for 1..- assuming the sample is from a normal population. {a} 90 percent confidence. (Round your answers to 4 declmal places.) The 90% confidence interval is from 36.9066 to 43.1934 (b) 95 percent confidence. [Round your answers to 4 declmal places.) The %% confidence interval is from 36.1948 to 43.6052 {c} 99 percent confidence. (Round your answers to 4 declmel places.) The 99% confidence interval is from 34.9992 to 45.0098 (d) Describe how the intervals change as you increase the confidence level. 0 The interval gets narrower as the confidence level increases. 0 The interval gets wider as the confidence level decreases. O The interval gets wider as the confidence level increases. 0 The interval stays the same as the confidence level increases.

Section Exercise 842 Use the sample infom’lation I = 42. o = 7. r1 = 16 to calculate the following confidence intervals for 1..- assuming the sample is from a normal population. {a} 90 percent confidence. (Round your answers to 4 declmal places.) The 90% confidence interval is from 36.9066 to 43.1934 (b) 95 percent confidence. [Round your answers to 4 declmal places.) The %% confidence interval is from 36.1948 to 43.6052 {c} 99 percent confidence. (Round your answers to 4 declmel places.) The 99% confidence interval is from 34.9992 to 45.0098 (d) Describe how the intervals change as you increase the confidence level. 0 The interval gets narrower as the confidence level increases.
0 The interval gets wider as the confidence level decreases. O The interval gets wider as the confidence level increases. 0 The interval stays the same as the confidence level increases.

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