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: IE3 m a) What is a point estimate for the population mean length of time. (Round answer to 4 decimal places) :1 b) What must be true in order to construct a confidence interval in this situation? Select an answer c) Construct a 90% confidence interval for the population mean length of time. Enter your answer as an open-interval (119., parentheses example (5.2314,8.1245)) Round upper and lower bounds to 4 decimal places. [:1 d) 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. 90% of all confidence intervals found using this same sampling technique will contain the population mean time. 90% of all times will fall within this interval. The confidence interval contains 90% of all sample times. e) Suppose that the company releases a statement that the mean time for all patients is 2 hours. Is this possible? ? Is it likely? E] Question Help: El Video