A random sample of 20 items is drawn from a population whose standard deviation is unknown. The sample mean is = 930 and the sample standard deviation is s = 5. Use Appendix D to find the values of Student's t. (a) Construct an interval estimate ofu with 98% confidence. (Round your answers to 3 decimal places.) The 98% confidence interval is from to (b) Construct an interval estimate of u with 98% confidence, assuming that s = 10. (Round your answers to 3 decimal places.) to The 98% confidence interval is from (c) Construct an interval estimate of u with 98% confidence, assuming that s = 20. (Round your answers to 3 decimal places.) The 98% confidence interval is from to

A random sample of 20 items is drawn from a population whose standard deviation is unknown. The sample mean is = 930 and the sample standard deviation is s = 5. Use Appendix D to find the values of Student's t. (a) Construct an interval estimate ofu with 98% confidence. (Round your answers to 3 decimal places.) The 98% confidence interval is from to (b) Construct an interval estimate of u with 98% confidence, assuming that s = 10. (Round your answers to 3 decimal places.) to The 98% confidence interval is from (c) Construct an interval estimate of u with 98% confidence, assuming that s = 20. (Round your answers to 3 decimal places.) The 98% confidence interval is from to

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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Question

Find the confidence interval

A random sample of 20 items is drawn from a population whose
standard deviation is unknown. The sample mean is = 930 and the
sample standard deviation is s = 5. Use Appendix D to find the values of
Student's t.
(a) Construct an interval estimate of u with 98% confidence. (Round
your answers to 3 decimal places.)
The 98% confidence interval is from
to
(b) Construct an interval estimate of u with 98% confidence, assuming
that s = 10. (Round your answers to 3 decimal places.)
The 98% confidence interval is from
to
(c) Construct an interval estimate of u with 98% confidence, assuming
that s= 20. (Round your answers to 3 decimal places.)
The 98% confidence interval is from
to
(d) Describe how the confidence interval changes as s increases.

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