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

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

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

• 0 A
• 1 B
• 13 C
• 15 D

For a constant k, the variance of k is

• zero A
• k² B
• k C
• none of these D

The range of probability is between

• 0 to 2 A
• -1 to +1 B
• 0 to 8 C
• 0 to 1 D

The probability of an impossible event is.

• Positive A
• Zero B
• Negative C
• 1 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

When a die and a coin are rolled together all possible outcomes are.

• 2 A
• 6 B
• 12 C
• 36 D

Probability distribution of a continuous random variable can be presented by

• tabular form A
• Formula B
• Curve C
• None of these D

If a Vann diagram is drawn for events A and B which are mutually exclusive, which f the folloiwng would always be true of A and B.

• Theire parts of the rectangle will overlap A
• Their parts fo the rectangle will be equal in area B
• Their parts of the rectangle will not overlap C
• None of these D

The probability of continuous random variable at x = a is__________.

• One A
• Zero B
• Between C
• More then one D

the term 'event' is used for.

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

Which is the impossible event when a dice is rolled.

• 5 or 6 A
• 6 or 7 B
• 2 or 3 C
• 1 D

F(-∞) is always equal to.

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

The probability of getting two red balls with replacement from a bag containing 4 red, 3 white and 3 black balls is.

• 4/25 A
• 1/25 B
• 9/100 C
• 2/25 D

What is the probability that a value chosen at random from a particular population is larger than the median of the popultion.

• 0.25 A
• 0.5 B
• 1.0 C
• 0.67 D

E(x) = Σxf(x) if it ________ absolutely.

• Equal A
• Converges B
• Discrete  C
• None of these D