**911. A table with all possible value of a random variable and its corresponding probabilities is called __________**_

A. Probability Mass Function

B. Probability Density Function

C. Cumulative distribution function**D. Probability Distribution**

**912. A variable that can assume any value between two given points is called ___________****A. Continuous random variable**

B. Discrete random variable

C. Irregular random variable

D. Uncertain random variable

**913. If a variable can certain integer values between two given points is called ___________**

A. Continuous random variable**B. Discrete random variable**

C. Irregular random variable

D. Uncertain random variable

**914. The expected value of a discrete random variable ‘x’ is given by ___________**

A. P(x)

B. ∑ P(x)**C. ∑ x P(x)**

D. 1

**915. If ‘X’ is a continuous random variable, then the expected value is given by ___________**

A. P(X)

B. ∑ x P(x)**C. ∫ X P(X)**

D. No value such as expected value

**916. Out of the following values, which one is not possible in probability?**

A. P(x) = 1

B. ∑ x P(x) = 3

C. P(x) = 0.5**D. P(x) = – 0.5**

**917. If E(x) = 2 and E(z) = 4, then E(z – x) =?****A. 2**

B. 6

C. 0

D. Insufficient data

**918. Value of [(n +1)⁄4]th term is the formula of****A.1st quartile**

B.2nd quartile

C.mode

D.3rd quartile

**919. The middle observation in an arranged set of data is called**

A.mean

B.mode**C.median**

D.range

**920. The nth root of the product of the values x1, x2, x3, …..,xn is called**

A.arithmetic mean**B.geometric mean**

C.variance

D.harmonic mean