(A) 50
(B) 70
(C) 50/20
(D) 50-20 = 30
Tag: Statistics Multiple Choice Questions
Var(2X+3) is__.
(A) 5 Var(X)
(B) 4 Var(X)
(C) 4 Var(X)+3
(D) 5 Var(X)+3
The variance of a constant is__.
(A) Zero
(B) Constant
(C) a
(D) None
If Y=−8X − 5 and SD of X is 3, then SD of Y is __.
(A) 8
(B) 3
(C) 5
(D) 24
For a symmetrical distribution approximately 68% of the cases are included between __.
(A) X¯¯¯¯−S and X¯¯¯¯+S
(B) X¯¯¯¯−2S and X¯¯¯¯+2S
(C) X¯¯¯¯−3S and X¯¯¯¯+3S
(D) None of these
__ is used to criterion of consistency i.e for consistence performance.
(A) Range
(B) Standard Deviation
(C) Coefficient of Variation
(D) Mean Deviation
If the third moment about mean is zero then distribution is__.
(A) Mesokurtic
(B) Positively Skewed
(C) Symmetrical
(D) Negatively Skewed
Quartile Coefficient of skewness lies between__.
(A) 0 and 1
(B) -1 and +1
(C) -1 and 0
(D) None of these