9.3

A statistics instructor randomly selected four bags of oranges, each bag labeled 10 pounds, and weighed the bags. They weighed 9.2, 9.4, 9.1, and 9.8 pounds. = Assume that the distribution of weights is Normal. Find a 95% confidence interval for the mean weight of all bags of oranges. Use technology for your calculations. Answer parts a and b below a. Choose the correct interpretation of the confidence interval below and, if necessary, fill in the answer boxes to complete your choice. O A. We are 95% confident the population mean is between and O B. There is a 95% chance that all intervals will be between and O C. We are 95% confident that the sample mean is between and O D. The requirements for constructing a confidence interval are not satisfied. (Type integers or decimals rounded to the nearest thousandth as needed. Use ascending order.) The acceptance rate for a random sample of 8 medical schools in a country was taken. The mean acceptance rate for this sample was 5.51% with a standard error of 0.54%. Assume the distribution of acceptance rates is Normal. Complete parts (a) and (b). a. Decide which of the following statements is worded correctly for the confidence interval. Fill in the blanks for the correctly worded one Explain the error for the ones that are incorrectly worded. Select the correct choice below and fill in the answer boxes to complete your choice (Round to two decimal places as needed. Use ascending order.) A. We are 95% confident that the sample mean is between % and % O B. We are 95% confident that the population mean is between % and % O C. There is a 95% probability that the population mean is between % and %