Each year, all final year students take a mathematics exam. It is hypothesised that the population mean score for this test is 85. It is known that the population standard deviation of test scores is 18. A random sample of 32 students take the exam. The mean score for this group is 76. You may find this standard normal table useful throughout the following questions. Calculate the 95% confidence interval for the population mean test score. Give your answers to 2 decimal places. ? ≤ μ ≤ ?