. Six different second year medical students at Bellevue hospital measured the blood pressure of the same person. The systolic readings (in mmHg) are listed below. Find the range, variance, and standard deviation for the given sample data. If the subjects blood pressure remains constant and the medical students correctly apply the same measurement technique, what should be the value of the standard deviation? 136, 129, 141, 139,138, 127 Range____________ Variance____________ (round to the nearest tenth) Standard Deviation____________________(round to the nearest tenth) What should the value of the standard deviation be?