How do you find the median incubation period for these symptoms? 8 individuals got sick at the following times (7:30pm, 7:45pm, 8:30pm, 8:50pm, 9:30pm, 11:00pm, 11:30pm, 11:55pm). The times are in order of onset from individuals 1-8. Im trying to find the average of the 4th and 5th times of onset, which are the times in bold. How do I find the average between those two times? Thanks.