A random sample of 20 items is drawn from a population whose standard deviation is unknown. The sample mean is x¯x¯ = 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 μ with 98% confidence. (Round your answers to 3 decimal places.) The 98% confidence interval is from _______ to _______.   (b) Construct an interval estimate of μ 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 μ 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
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A random sample of 20 items is drawn from a population whose standard deviation is unknown. The sample mean is x¯x¯ = 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 μ with 98% confidence. (Round your answers to 3 decimal places.)

The 98% confidence interval is from _______ to _______.

 

(b) Construct an interval estimate of μ 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 μ 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 ī = 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
Transcribed Image Text:A random sample of 20 items is drawn from a population whose standard deviation is unknown. The sample mean is ī = 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
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