Question 6

20 8-3 Homework Chapter 8 (Sections 8.4 through 8.6) i Saved Help Save & Exit Submit Check my work 6 A random sample of 11 items is drawn from a population whose standard deviation is unknown. The sample mean is =920 and the sample standard deviation is s = 25. Use Appendix D to find the values of Student's t 5 points (a) Construct an interval estimate of / with 95% confidence (Round your answers to 3 decimal places.) The 95% confidence interval is from to eBook Ask (b) Construct an interval estimate of // with 95% confidence, assuming that s = 50. (Round your answers to 3 decimal places.) Print The 95% confidence interval is from to References (c) Construct an interval estimate of // with 95% confidence, assuming that s = 100. (Round your answers to 3 decimal places.) The 95% confidence interval is from to (d) Describe how the confidence interval changes as, s increases O The interval stays the same as s increases O The interval gets wider as s increases. O The interval gets narrower as s increases