A sample of size n = 56 is drawn from a normal population whose standard deviation is o=5.5. The sample mean isx = 37.71.-Part 1 of 2(a) Construct a 99% confidence interval for u. Round the answer to at least two decimal places.A 99% confidence interval for the mean isPart 2 of 2<μ<X(b) If the population were not approximately normal, would the confidence interval constructed in part (a) be valid?Explain.2022 McGraw HillThe confidence interval constructed in part (a) (Choose one) ▼ be valid since thesample size (Choose one) ▼ large.XSubmit Assignmentrved. Terms of Use | Privacy Center | Accessibility3

a) Suppose that µ is the population mean.

Answered: A sample of size n = 56 is drawn from a…

MATLAB: An Introduction with Applications

6th Edition

ISBN:9781119256830

Author:Amos Gilat

Publisher:Amos Gilat

Chapter1: Starting With Matlab

Section: Chapter Questions

Problem 1P

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A simple random sample of size n = 15 is drawn from a population that is normally distributed. The sample mean is found to be x= 68 and the sample standard deviation is found to be s = 11. Construct a 95% confidence interval about the population mean. The lower bound is The upper bound is (Round to two decimal places as needed.)
A sample of size n = 47 has sample mean * = 57.6 and sample standard deviation s=9.5. Answer the two questions.
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A sample of size n= 60 is drawn from a population whose standard deviation is o = 33. Part 1 of 2 (a) Find the margin of error for a 90% confidence interval for µ. Round the answer to at least three decimal places. The margin of error for a 90% confidence interval for u is Part 2 of 2 X (b) If the sample size were n=82, would the margin of error be larger or smaller? because the sample size is (Choose one) (Choose one) x Ś Ś
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A random sample of 28 items is drawn from a population whose standard deviation is unknown. The sample mean is = 790 and the sample standard deviation is s= 15. Use Appendix D to find the values of Student's t (a) Construct an interval estimate of u with 99% confidence. (Round your answers to 3 decimal places.) The 99% confidence interval is from to (b) Construct an interval estimate of u with 99% confidence, assuming that s= 30. (Round your answers to 3 decimal places.) The 99% confidence interval is from to (c) Construct an interval estimate of p with 99% confidence, assuming that s= 60. (Round your answers to 3 decimal places.) The 99% 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.
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A sample of size n = 56 is drawn from a normal population whose standard deviation is a=5.5. The sample mean x = 37.71. Part 1 of 2 (a) Construct a 99% confidence interval for u. Round the answer to at least two decimal places. A 99% confidence interval for the mean is Part 2 of 2