First Year ICS Statistics Chapter 7 Online MCQ Test (Random Variables)

The probability of drawing a king of spade from a pack of 52 cards is.

• 1/4 A
• 1/13 B
• 1/26 C
• 1/52 D

the term 'event' is used for.

• Time A
• Subaet of the sample space B
• Total number of outcomes C
• Probability D

E(Y2) -[E(y)]2 is the formula, and to compute.

• Variance of the random variable A
• Mean of the random variable B
• Both A and B C
• None of these D

Var (B/aX) =?

• 1/aVar(X) A
• b²/a² Var(X) B
• b²/a Var(X) C
• None of these D

F (+∞) is always equal to:

• 0 A
• Two B
• One  C
• None of these D

The probability of getting one red ball from a bag constaining 4 red, 3 white and 3 black balls is.

• 3/10 A
• 1/5 B
• 2/5 C
• 1/2 D

F(-∞) is always equal to

• Zero A
• One B
• Two C
• Negative one D

• 4/10 A
• 2/10 B
• 1/10 C
• 0 D

Coefficient  of variation (C.V) is given below

• Mean /S.D x10 A
• Mean/S.D x 100 B
• S.D/Mean x 100  C
• S.D/ Mean  D

F(-∞) is always equal to.

• Zero A
• One B
• Two  C
• Negative one D

The simple probability of occurrence of an event in called the.

• Joint probability A
• Conditional probability B
• Marginal probability C
• Subjective probability D

The properties of discrete probability distribution are:

• Σp (x) = 1 and Σx. (x) = 1 A
• ΣP (x)= 1 and Σx. P B
• ΣP(x) = 1 and 0 < P(x) ≤ 1 C
• All of these above D

The simplest form of the continuous distribution is the.

• Skewed distribution A
• Kurtic distribution B
• Binomial distribution C
• Uniform distribution D

Random variable is also called ___________.

• Chance stochasitc A
• Coverges  B
• Random C
• None of these D

Var (KY) = ......................

• KY A
• K² Var(Y) B
• K²Var (Y) C
• None of these D

For discrete random variable 'X' the expectation of X I-e E(x) is equal to:

• Σp(x) A
• Σxp(x) B
• Σx²p(x) C
• One D

Which one is not an example of random experiments.

• A coin is tossed and the outcome is either a head or a tail A
• A six sided aid is rolled B
• All medical insurance clams received by a company in a given year. C
• Some one of person will be admitted to a hospital emergency room during any hour. D