SOLUTION: 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
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Question 1055588: 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 subject's blood pressure remains constant and the medical students correctly apply the same measurement technique, what should be the value of the standard deviation? 127 150 121 120 140 128
I got the range but don't understand how to get the variance and the standard deviation Answer by ewatrrr(24785) (Show Source):
Hi
Using Excel..Statistical Calculator would work as well
x x -131 (x-131)^2
127 -4 16
150 19 361
121 -10 100
120 -11 121
140 9 81
128 -3 9
sum 786 0 688
sum/6 131 sum/5 137.6 variance
√137.6 11.7 standard deviation (rounded to nearest tenth)
