The lengths of power failures, in minutes, are recorded in the following table. 22 18 135 15 90 78 69 98 102 83 55 28 121 120 13 22 124 112 70 66 74 89 103 24 21 112 21 40 98 87 132 115 21 28 43 37 50 96 118 158 74 78 83 93 95 (a) Find the sample mean and sample median of the power-failure times. (b) Find the sample standard deviation of the powerfailure times.

#complex data analysis examples #A machine that mass produces rubber gaskets can be set at one of three different #speeds: 100, 150 or 200 askes per minute. As part of a quality control study, the #machine was monitored several different times at each of the three speeds and the number #of defectives produced per hour was recorded. The data are provided in the table. Since #the number of...