Statistics Ics Part 1 Chapter 7 Online Test

The Area of trapezoid is equal to:

• sum of paralled sides x base A
• sum of paralled sides x base/2 B
• 2 x base x sum of paralled side  C
• Sum of paralled sides x base/4 D

Waht is the probability that a ball drawn at random from the bag is.

• 0.1 A
• 0.4 B
• 1.0 C
• Cannot be determined from given information D

Tossing two dice possble sampes are.

• 2 A
• 6 B
• 12 C
• 36 D

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

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

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

• 8 A
• 0 B
• 1/8 C
• 3 D

For a constant K ,the variance of K.

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

The probability of getting an odd number when a balanced die is rolled is.

• 1/2 A
• 1/3 B
• 1/4 C
• 1/6 D

Var (3x + 2)

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

When a pair of dice is rolled, the sum of upperemost dots vary from.

• 0 to 10 A
• 1 to 11 B
• 2 to 19 C
• 2 to 12 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

The result of no interest of an experiment is called.

• Contstant A
• even B
• Failure C
• Success D

The probability of an event connot be.

• = 0 A
• > 0 B
• =1 C
• < 0 D

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

• 0 A
• 1 B
• 13 C
• All of them D

When two dice are rolled, the maximum totla on the two faces of dice will be.

• 2 A
• 6 B
• 12 C
• 36 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

The numbered balls are paced in an urn, Numbers 1- 4 are red and numbers 5 -10 are blue. the probability that a ball drawn at random from the run is blue is.

• 0.1 A
• 0.4 B
• 0.6 C
• 1.0 D