d. What must be true in order to construct a confidence interval in this situation? O The population must be approximately normal O The population mean must be known O The population standard deviation must be known O The sample size must be greater than 30 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 (2.40,2.58) f. Interpret the confidence interval in a complete sentence. Make sure you include units 95% confident that the population mean is between 2.40 hours and 2.58 hours. g. What does it mean to be "95% confident" in this problem? Use the definition of confidence level. 95% of all simple random samples of size 11 from this population will result in confidence intervals that contain the population mean O The confidence interval contains 95% of all samples There is a 95% chance that the confidence interval contains the population mean h. Suppose that the company releases a statement that the mean time for all patients is 2 hours. Is this possible? O Yes O No