Question 311235
The mean is 3.73, the standard deviation is 2.1. 
A value of 8 would give you a z-score of 2.03, a little greater than 2 standard deviations from the mean. I guess "unusual" is in the eye of the beholder and it would depend on your level of concern regarding airline travel. I would feel better if the mean was lower and the standard deviation smaller but I wouldn't think that 8 was unusual based on the data.