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5. A football coach randomly selected six of his players and timed how long each player took to perform a certain drill. The times (in minutes) are shown. Determine a 95% confidence interval for the true mean time it takes his players to perform this drill. Assume the variable is normally distributed. 11.4 12.8 12.7 10.7 14.6 10.9 a. Write the correct symbol in each blank. We are estimating parameter . Our best point estimate for this parameter is b. We use a (select Zlnterval or Tlnterval) because c. Write the confidence interval found using the TIES/84 interval stated in part (b) in the form lower limit