Which of the following correctly lists the data sets in order of least to greatest standard deviation?
I. 56, 56, 56, 56, 56, 56
II. 5, 7, 16, 18, 25, 32
III. 6,7,8,9,10,11,12 Choose the correct option.
A) I, II, III
B) I, III, II
C) II, I, III
D) I, III, II
E) III, II, I
out of three given sets,   I has all numbers same, so it has zero standard deviation hence it is Least   only answer choices C and E have I in least position.   Out of I ans III   III has consecutive numbers , hence all are closedly spaced hence std deviation will be less   while in II,numbers are spread widely hence std deviation should be more than III   hence order should be I, III,II   IMO I, III, II
<result>D</result>
Which of the following correctly lists the data sets in order of least to greatest standard deviation?
I. 56, 56, 56, 56, 56, 56
II. 5, 7, 16, 18, 25, 32
III. 6,7,8,9,10,11,12