Question

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?

141 149 138 121 143 136

Range=____mmHg

Sample variance=______mmHg^2​ (Round to the nearest tenth as​ needed.)

Sample standard deviation=_______mmHg​ (Round to the nearest tenth as​ needed.)

What should be the value of the standard​ deviation?

A. ​Ideally, the standard deviation would be one because all the measurements should be the same.

B. ​Ideally, the standard deviation would be zero because all the measurements should be the same.

C. ​Ideally, the standard deviation would be one because this is the lowest standard deviation that can be achieved.

D. There is no way to tell what the standard deviation should be.

Answer 1