Psychologists want to estimate the mean attention time given to twins per week by their parents. A sample of 85 sets of twin boys is taken and the attention time given to them by their parents in a week is recorded. The results are a mean time of 28.51 hours with a standard deviation of 5.09 hours. Construct a 95% confidence interval for the population mean attention time given all twins. Round your answers to two decimal places. > Next(