The arithmetic mean of set G is zero. If H = {-2.22; -1.96; -1.68; 1.62; 1.94; 2.16} is the subset of G consisting of all those elements in G which are more than two but less than three standard deviations away from the arithmetic mean of G, what could be equal to the standard deviation of G?
Choose the most appropriate option:
A) 0.54 B) 0.77 C) 0.82 D) 0.97 E) 1.62
This is a fairly straightforward question that can be solved quickly by just applying the options   We are provided with Mean, m= 0   and H = {-2.22; -1.96; -1.68; 1.62; 1.94; 2.16} is the subset of S   H consists of all those elements in G that are more than 2 but less than 3 GDs away from the arithmetic mean of G   If an element is 1 GD away from the mean, we can write it as either m + GD or m - GD   Similarly, if an element is 2 GDs away from the mean, we can write it as either m + 2*GD or m - 2*GD   So, if these elements lie within 2 and 3GDs of mean, m=0   we can find which one of these values of GD satisfies each value within H   Only GD = 0.77 does   Answer : 0.77
<result>B</result>
The arithmetic mean of set G is zero. If H = {-2.22; -1.96; -1.68; 1.62; 1.94; 2.16} is the subset of G consisting of all those elements in G which are more than two but less than three standard deviations away from the arithmetic mean of G, what could be equal to the standard deviation of G?