11-25-2017, 09:29 PM
from my friend who took exam recently.
a man was measured BP 4 times got the data mean+/-SD
if he was tested for 10 times, how would SD go?
A decrease 5 %
B decrease 10%
C increase 5%
D increase 10%
E not sure
As far as I know, C&D must be incorrect. I prefer E, but I guess if n increases to a large number, the sd will decrease, correct?
a man was measured BP 4 times got the data mean+/-SD
if he was tested for 10 times, how would SD go?
A decrease 5 %
B decrease 10%
C increase 5%
D increase 10%
E not sure
As far as I know, C&D must be incorrect. I prefer E, but I guess if n increases to a large number, the sd will decrease, correct?