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MATLAB: An Introduction with Applications
6th Edition
ISBN: 9781119256830
Author: Amos Gilat
Publisher: John Wiley & Sons Inc
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b Answered: What is a point estimate for the... | bartleby
b Answered: An engineer wishes to determine the... | bartleby
Suppose you are a researcher in a hospital. You are experimenting with a new tranqunizer. You collEtt data
from a random sample of 11 patients. The period of effectiveness of the tranquilizer for each patient (in
hours) is as follows:
Hours
3
3
2.9
2.5
2.5
3
2.7
2.4
2.7
3
3
What is a point estimate for the population mean length of time. (Round answer to 2 decimal places)
2.79
What must be true in order to construct a confidence interval in this situation?
The population must be approximately normal
Construct a 90% confidence interval for the population mean length of time. (Round upper and lower bounds
to 2 decimal places.)
What does it mean to be "90% confident" in this problem?
There is a 90% chance that the confidence interval contains the sample mean time.
The confidence interval contains 90% of all sample times.
90% of all times will fall within this interval.
O 90% of all confidence intervals found using this same sampling technique will contain the population
mean time.
Suppose that the company releases a statement that the mean time for all patients is 2 hours.
Is this possible?"
Transcribed Image Text:Safari
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Sun 10:16
A myopenmath.com
МyOpenMath
b Answered: What is a point estimate for the... | bartleby
b Answered: An engineer wishes to determine the... | bartleby
Suppose you are a researcher in a hospital. You are experimenting with a new tranqunizer. You collEtt data
from a random sample of 11 patients. The period of effectiveness of the tranquilizer for each patient (in
hours) is as follows:
Hours
3
3
2.9
2.5
2.5
3
2.7
2.4
2.7
3
3
What is a point estimate for the population mean length of time. (Round answer to 2 decimal places)
2.79
What must be true in order to construct a confidence interval in this situation?
The population must be approximately normal
Construct a 90% confidence interval for the population mean length of time. (Round upper and lower bounds
to 2 decimal places.)
What does it mean to be "90% confident" in this problem?
There is a 90% chance that the confidence interval contains the sample mean time.
The confidence interval contains 90% of all sample times.
90% of all times will fall within this interval.
O 90% of all confidence intervals found using this same sampling technique will contain the population
mean time.
Suppose that the company releases a statement that the mean time for all patients is 2 hours.
Is this possible?
Expert Solution
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Step 1
Given, the data from a random sample of n=11 patients regarding the period of effectiveness of tranquilizer for each patient.
The point estimate for the population mean length of time is obtained as-
In order to construct a confidence interval in this situation "The population must be approximately normal"
The required standard deviation for the sample is obtained as-
The degrees of freedom is obtained as-
Step by stepSolved in 3 steps
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