A pressure control system is designed to maintain the pressure at a constant value of
1000 mbar inside a distillation column.
(a) The following test set of initial pressure measurements is obtained: 1015, 1003,
1044, 1000 985, 971, 999, 990, 994, 1000, 1032, 1001 973, 1006 979, 961,
1010, 1021 997, 1026.
Show that this is free of rogue data points and therefore can be used as a reference set against which to test future pressure measurements.
(b) The pressure is then measured at 5-minute intervals and the following 20 measurements are obtained: 961, 1010 990, 1039 997, 1015, 1000 949, 1000, 1051,
1001 976, 1003 985, 932, 1006 999, 1021, 1029 994.
Test whether there are any rogue measurements in this data set.