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 thats= 30. (Round your answers to 3 decimal places.) The 99% confidence interval is from to (c) Construct an interval estimate of u with 99% confidence, assuming thats = 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.

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 thats= 30. (Round your answers to 3 decimal places.) The 99% confidence interval is from to (c) Construct an interval estimate of u with 99% confidence, assuming thats = 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.

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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Estimation

A new framework of data analysis where the new statistical methods are used for interpreting the results and analyzing the data is known as estimation in statistics.

Question

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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