Suppose you are a researcher in a hospital. You are experimenting with a new tranquilizer. You collect data from a random sample of 11 patients. The period of effectiveness of the tranquilizer for each patient (in hours) is as follows: 

1.) Construct a 99% confidence interval for the population mean length of time. (Round upper and lower bounds to 2 decimal places.)

What does it mean to be “99% confident” in this problem? 

Suppose you are a researcher in a hospital. You are experimenting with a new tranquilizer. You collect data from a random sample of 9 patients. The period of effectiveness of the tranquilizer for each patient (in hours) is as follows: 

1)What is a point estimate for the population mean length of time. (Round answer to 2 decimal places)

   
2)What must be true in order to construct a confidence interval in this situation?

Select an answer:

a)The population mean must be known 

b)The sample size must be greater than 30 

c)The population must be approximately normal 

d)The population standard deviation must be known 

3)Construct a 98% confidence interval for the population mean length of time. (Round upper and lower bounds to 2 decimal places.) 

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4) What does it mean to be “98% confident” in this problem? 

5) 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 9 patients. The period of effectiveness of the tranquilizer for each patient (in hours) is as follows:

a. What is a point estimate for the population mean length of time. (Round answer to 4 decimal places)

b. Which distribution should you use for this problem?

c. Why? 

d. What must be true in order to construct a confidence interval in this situation?  

e. Construct a 95% confidence interval for the population mean length of time. Enter your answer as an open-interval (i.e., parentheses) Round upper and lower bounds to two decimal places 

f. Interpret the confidence interval in a complete sentence. Make sure you include units 

g. What does it mean to be “95% confident” in this problem? Use the definition of confidence level. 

h. Suppose that the company releases a statement that the mean time for all patients is 2 hours.

Is this possible?

 Is it likely?

Suppose you are a researcher in a hospital. You are experimenting with a new tranquilizer. You collect data from a random sample of 13 patients. The period of effectiveness of the tranquilizer for each patient (in hours) is as follows:

Construct a 90% confidence interval for the population mean length of time. Enter your answer as an open-interval (i.e., parentheses) Round upper and lower bounds to two decimal places.

I just need help with constructing the confidence interval please, thank you! Its the last question for this

Suppose you are a researcher in a hospital. You are experimenting with a new tranquilizer. You collect data from a random sample of 9 patients. The period of effectiveness of the tranquilizer for each patient (in hours) is as follows:

What is a point estimate for the population mean length of time. (Round answer to 4 decimal places) Correct

Construct a 99% confidence interval for the population mean length of time. Enter your answer as an open-interval (i.e., parentheses) Use a critical value rounded to three decimal places. Round upper and lower bounds to two decimal places. 

What does it mean to be “99% confident” in this problem? _________

Suppose you are a researcher in a hospital. You are experimenting with a new tranquilizer. You collect data from a random sample of 10 patients. The period of effectiveness of the tranquilizer for each patient (in hours) is as follows: 

Construct a 95% 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.) 

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