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...

Extracted 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? ?


Extracted 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? ?