Use the given degree of confidence and sample data to construct a confidence interval for the population mean μ. assume that the population has a normal distribution. the football coach randomly selected ten players and timed how long each player took to perform a certain drill. the times (in minutes) were: 7.0 10.8 9.5 8.0 11.5 7.5 6.4 11.3 10.2 12.6 determine a 95% confidence interval for the mean time for all players.