5-BOXSTAYS 100 in a factory, the time during working hours in which a machine to not operating 22. result of breakage or failure is called the 'downtime". The following distripas 10250 shows a sample of 100 downtimes of a certain machine (rounded to the no, minute): Frequencies Downtime 0-9 13 10 - 19 20-29 30 -39 40 -49 - NAOLUC 50-59 60 -69 70- 79 80 - 89 With reference to the above distribution, calculate (a) the mean. (b) the standard deviation. (C) the median. the quartiles Qi and Q3. the deciles D, and Do