Mr A, the mine superintendent of Coal Co., has recorded the amount of time per work shift that section crew #3 shuts down its machinery for on the spot adjustments, repair and moving. Here are the records for the crew's last 35 shifts:

60 70 126 110 91 115 112

80 66 101 75 93 129 105

113 121 93 87 119 111 97

102 116 114 107 113 119 100

110 99 139 108 128 84 99

a) If Aslam believe that a typical amount of downtime per shift is 108 minutes, how many of Crew #3's last 35 shift exceeding this limit? How many are under the limit?

b) Construct a relative frequency distribution with 10-minute intervals.

c) Does your frequency distribution indicate that Aslam should be considered?