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

 Var (3x+2)

• 3Var(x) + 2 A
•  9Var(x) +2 B
• Var (x) + 0  C
• 3Var (X) D

• 8 A
• 0 B
• 1/8 C
• 3 D

Is the tossing of two perfect coins the probability at least one head occur is.

• 1/4 A
• 1 B
• 1/2 C
• 3/4 D

F(y₁) ≤ F(y₂) if

• y₁= y₂ A
• Y₁>y₂ B
• y₁≤y₂ C
• y≥1/2 D

If the random variable x denotes the number of heads of when three distinct coins are tossed k the X assumes values.

• 0,1,2,3 A
• 1,3,3,1 B
• 1,2,3 C
• 1,1,1,1 D

If one event is unaffected by the outcome of another event, the two events are said to be

• Dependent A
• Independent B
• Mutually exclusive C
• Both b and c D

• y₁ = y₂ A
• Y₁ > y₂ B
• 
  C
• None of these D

A student soved 25 questions from first 50 questios of a book to be solved. The prob, that he will solve the remaining all questions.

• 0.25 A
• 0.51 B
• 1 C
• 0 D

For a constant K ,the variance of K.

• Zero A
• A^-2 B
• K C
• None of these D

The probability of an event connot be.

• = 0 A
• > 0 B
• =1 C
• < 0 D

Which of the following is suitable for discrete probability distribution.

• Frequency polygon A
• Probability B
• Ogive C
• Histogram D

When three coins are tossed simulatneously, P(3 heads) is.

• 3/8 A
• 1/2 B
• 1/8 C
• 1/4 D

F (+∞) is always equal to:

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

If x is a random variable with E(x) = 5 then E (3x - 2) =

• 0 A
• 1 B
• 13 C
• 15 D

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

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

A random variable is also called.

• Chance variable A
• Stochastic variable B
• Discrete variable C
• Both A and B D

Tossing two dice possble sampes are.

• 2 A
• 6 B
• 12 C
• 36 D