Mean, Median, Mode Range, Standard Deviation:0.28, 0.55, 0.90, 8, 20, 20, 21, 26, 30, 39, 42, 65, 98?

A study was conducted investigating the long-term prognosis of children who have suffered an acute episode of bacterial meningitis. Listed above are the times to the onset of seizure for 13 children who took part in the study. Find the following numerical summary measures of the data. Mean, median, mode, range and standard deviation.