Which formula is used to calculate the standard deviation of sample data?
H
-
1
2 (x1 - x)2+(x2-x)2 +...+(XN-6) 2
N
16--, (**)*(8=)*.- (89w=
X1-X
+
X2-X
+...+
X
-X
n-1

Which of the following equations is of the parabola whose vertex is at (2, 3), axis of symmetry parallel to the y-axis and p = 4? a.)y-3 = 1/16 (x-2)^2 b.)y+3 = -1/16 (x+2)^2 c.)x-2 = 1/16 (y-3)^2