Suppose that population standard deviation of 6.6 hours. The population distribution is assumed to be normal. firm ddes Sstudy NOTE: If you are using a Student's t-distribution, you may assume that the underlying population is normally distributed. (In general, you must first prove that assumption, though.) O Part (a) O Part (b) O Part (c) O Part (d) Construct a 90% confidence interval for the population mean time to complete the tax forms. ) State the confidence interval. (Round your answers to two decimal places.) (i) Sketch the graph. (Round your answers to two decimal places.) C.L. =
Suppose that population standard deviation of 6.6 hours. The population distribution is assumed to be normal. firm ddes Sstudy NOTE: If you are using a Student's t-distribution, you may assume that the underlying population is normally distributed. (In general, you must first prove that assumption, though.) O Part (a) O Part (b) O Part (c) O Part (d) Construct a 90% confidence interval for the population mean time to complete the tax forms. ) State the confidence interval. (Round your answers to two decimal places.) (i) Sketch the graph. (Round your answers to two decimal places.) C.L. =
MATLAB: An Introduction with Applications
6th Edition
ISBN:9781119256830
Author:Amos Gilat
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Chapter1: Starting With Matlab
Section: Chapter Questions
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Can someone please help walk me through how I complete this graph?
![Suppose that an accounting firm does a study to determine the time needed to complete one person's tax forms. It randomly surveys 100 people. The sample mean is 22.5 hours. There is a known
population standard deviation of 6.6 hours. The population distribution is assumed to be normal.
NOTE: If you are using a Student's t-distribution, you may assume that the underlying population is normally distributed. (In general, you must first prove that assumption, though.)
OPart (a)
Part (b)
OPart (c)
Part (d)
Construct a 90% confidence interval for the population mean time to complete the tax forms.
(i) State the confidence interval. (Round your answers to two decimal places.)
(ii) Sketch the graph. (Round your answers to two decimal places.)
C.L. =
%3D
%3D
2
2
(iii) Calculate the error bound. (Round your answer to two decimal places.)](/v2/_next/image?url=https%3A%2F%2Fcontent.bartleby.com%2Fqna-images%2Fquestion%2F6d7770a1-2495-4148-9cf6-f0f9c25c2ce5%2Fded69bdc-68a7-483f-9190-c4f656cf1a31%2Fxka1qui_processed.jpeg&w=3840&q=75)
Transcribed Image Text:Suppose that an accounting firm does a study to determine the time needed to complete one person's tax forms. It randomly surveys 100 people. The sample mean is 22.5 hours. There is a known
population standard deviation of 6.6 hours. The population distribution is assumed to be normal.
NOTE: If you are using a Student's t-distribution, you may assume that the underlying population is normally distributed. (In general, you must first prove that assumption, though.)
OPart (a)
Part (b)
OPart (c)
Part (d)
Construct a 90% confidence interval for the population mean time to complete the tax forms.
(i) State the confidence interval. (Round your answers to two decimal places.)
(ii) Sketch the graph. (Round your answers to two decimal places.)
C.L. =
%3D
%3D
2
2
(iii) Calculate the error bound. (Round your answer to two decimal places.)
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