Listed below are the durations (in hours) of a simple random sample of all flights of a space shuttle. find the (a) mean, (b) median, (c) mode, and (d) midrange for the given sample data. is there a duration time that is very unusual? how might that duration time be explained? 68 92 231 189 169 267 196 381 257 231 385 330 219 239 0 (a) the mean is hours. (round to one decimal place as needed.) (b) the median is hours. (round to one decimal place as needed.) is there a duration time that is very unusual? how might that duration time be explained? (a) no, the flights have usual duration times ranging from 0 to over 375 hours. (b) yes, the time of 0 hours is very unusual. it could represent a flight that was aborted. (c) no, there is no flight with an unusual duration time. (d) yes, the time of more than 375 hours is very unusual. it could represent a very long flight.