951. If Xm is the largest value and Xo is the smallest value, then the range ‘R’ is equal to
A.R = Xm – Xo
B.R = Xm⁄Xo
C.R = Xm + Xo
D.none of above

952. 2nd quartile is also known as
A.mode
B.harmonic mean
C.arithmetic mean
D.median

953. The reciprocal of the arithmetic mean of the reciprocal of the values x1, x2, x3, …..,xn is known as
A.variance
B.geometric mean
C.harmonic mean
D.arithmetic mean

954. In the set of ‘n’,the median is located at the
A.(n + 1)⁄2th score
B.(n – 1)⁄2th score
C.(2n + 1)⁄2th score
D.(2n – 1)⁄2th score

955. A random variable that assumes a finite or a countably infinite number of values is called ___________
A. Continuous random variable
B. Discrete random variable
C. Irregular random variable
D. Uncertain random variable

956. A random variable that assume a infinite or a uncountably infinite number of values is called ___________
A. Continuous random variable
B. Discrete random variable
C. Irregular random variable
D. Uncertain random variable

957. If Σ P(x) = k2 – 8 then, the value of k is?
A. 0
B. 1
C. 3
D. Insufficient data

958. If P(x) = 0.5 and x = 4, then E(x) = ?
A. 1
B. 0.5
C. 4
D. 2

959. In a discrete probability distribution, the sum of all probabilities is always?
A. 0
B. Infinite
C. 1
D. Undefined

960. The expected value of a random variable is its ___________
A. Mean
B. Standard Deviation
C. Mean Deviation
D. Variance

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