Suppose you are a researcher in a hospital. You are experimenting with a new tranquilizer. You collect data fro random sample of 8 patients. The period of effectiveness of the tranquilizer for each patient (in hours) is as follows: Hours 2.1 2.9 2 2.8 2.7 2.7 2.5 2.3 What is a point estimate for the population mean length of time. (Round answer to 2 decimal places)

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Suppose you are a researcher in a hospital. You are experimenting with a new tranquilizer. You collect data from a
random sample of 8 patients. The period of effectiveness of the tranquilizer for each patient (in hours) is as
follows:
Hours
2.1
2.9
2
2.8
2.7
2.7
2.5
2.3
What is a point estimate for the population mean length of time. (Round answer to 2 decimal places)
What must be true in order to construct a confidence interval in this situation?
V Select an answer
The sample size must be greater than 30
ean length of time. (Round the critical value to 3 decimal
s.)
The population must be approximately normal
The population standard deviation must be known
The population mean must be known
What does it mean to be "99% confident" in this problem?
99% of all times will fall within this interval.
The confidence interval contains 99% of all sample times.
99% of all confidence intervals found using this same sampling technique will contain the population mean
time.
There is a 99% chance that the confidence interval contains the sample 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:Suppose you are a researcher in a hospital. You are experimenting with a new tranquilizer. You collect data from a random sample of 8 patients. The period of effectiveness of the tranquilizer for each patient (in hours) is as follows: Hours 2.1 2.9 2 2.8 2.7 2.7 2.5 2.3 What is a point estimate for the population mean length of time. (Round answer to 2 decimal places) What must be true in order to construct a confidence interval in this situation? V Select an answer The sample size must be greater than 30 ean length of time. (Round the critical value to 3 decimal s.) The population must be approximately normal The population standard deviation must be known The population mean must be known What does it mean to be "99% confident" in this problem? 99% of all times will fall within this interval. The confidence interval contains 99% of all sample times. 99% of all confidence intervals found using this same sampling technique will contain the population mean time. There is a 99% chance that the confidence interval contains the sample mean time. Suppose that the company releases a statement that the mean time for all patients is 2 hours. Is this possible? ?
Suppose you are a researcher in a hospital. You are experimenting with a new tranquilizer. You collect data from a
random sample of 8 patients. The period of effectiveness of the tranquilizer for each patient (in hours) is as
follows:
Hours
2.1
2.9
2
2.8
2.7
2.7
2.5
2.3
What is a point estimate for the population mean length of time. (Round answer to 2 decimal places)
What must be true in order to construct a confidence interval in this situation?
Select an answer
Construct a 99% confidence interval for the population mean length of time. (Round the critical value to 3 decimal
places. Round upper and lower bounds to 2 decimal places.)
What does it mean to be "99% confident" in this problem?
99% of all times will fall within this interval.
The confidence interval contains 99% of all sample times.
99% of all confidence intervals found using this same sampling technique will contain the population mean
time.
There is a 99% chance that the confidence interval contains the sample mean time.
v ?
No
Suppose that the
releases a statement that the mean time for all patients is 2 hours.
Yes
Is this possible? ?
Transcribed Image Text:Suppose you are a researcher in a hospital. You are experimenting with a new tranquilizer. You collect data from a random sample of 8 patients. The period of effectiveness of the tranquilizer for each patient (in hours) is as follows: Hours 2.1 2.9 2 2.8 2.7 2.7 2.5 2.3 What is a point estimate for the population mean length of time. (Round answer to 2 decimal places) What must be true in order to construct a confidence interval in this situation? Select an answer Construct a 99% confidence interval for the population mean length of time. (Round the critical value to 3 decimal places. Round upper and lower bounds to 2 decimal places.) What does it mean to be "99% confident" in this problem? 99% of all times will fall within this interval. The confidence interval contains 99% of all sample times. 99% of all confidence intervals found using this same sampling technique will contain the population mean time. There is a 99% chance that the confidence interval contains the sample mean time. v ? No Suppose that the releases a statement that the mean time for all patients is 2 hours. Yes Is this possible? ?
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