RESEARCH METHODOLOGY

The football coach randomly selected ten players and timed how long each player took to perform a certain drill. The times (in minutes) were:13.2, 5.1, 7.5, 8.0, 12.7, 7.6, 13.8, 14.5, 7.7, and 10.5. Determine a 99 percent confidence interval for the mean time for all players. (Assume that the population standard deviation is equal to 3.3)