Seven pilots were tested in a flight simulator, and the time taken (in seconds) for each of them to complete a certain corrective action was measured and given as follows. XXXXXXXXXX3.6 9.0 Construct...

Seven pilots were tested in a flight simulator, and the time taken (in seconds) for each of them to complete a certain corrective action was measured and given as follows. 5.2 7.9 7.6 4.3 4.8 3.6 9.0 Construct a 99% confidence interval for the standard deviation of the true variability for the time taken to complete the corrective action.