For the set {2, 2, 3, 3, 4, 4, 5, 5,7,7 x}, which of the following values of x will most increase the standard deviation? Choose the correct choice from the following options
A) 1	B) 2	C) 3	D) (-3.2)^2	E) 5
Standard Deviation Step 1, as pointed out by others, is to find out the mean = 4.2   Step 2, For each number: subtract the Mean and square the result =   (1-4.2)^2=(-3.2)^2   (2-4.2)^2=(-2.2)^2   (3-4.2)^2 =(-1.2)^2   (4-4.2)^2=(.2)^2   (5-4.2)^2=(.8)^2   Clearly (1-3.5)^2=(-3.2)^2 will give you the greatest value among all the other options.   Hence (-3.2)^2
<result>D</result>
For the set {2, 2, 3, 3, 4, 4, 5, 5,7,7 x}, which of the following values of x will most increase the standard deviation?