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): You can put this solution on YOUR website!


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)

 

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