**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