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

Which of the following is suitable for discrete probability distribution.

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

The coins are tossed, the porbability of two tails is euql to.

• 1/2 A
• 1/4 B
• 3/4 C
• 1 D

E(X ± Y) =..............

• E(X) + E(Y) A
• E(X) - E (Y) B
• E(x) ± E (Y) C
• None of these D

Why are the outcomes of a coin tossing mutually exclusive.

• The outcome of any toss is not affected by teh outcome of those preceding it. A
• Both a head and a tail cannot turn up on any one toss B
• The probability of getting a head and the probability of getting a tail is the same. C
• All of these D

For a constant k, the variance of k is

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

If two coins are tossed, the probability of getting one head and one tail is.

• 1/4 A
• 2/4 B
• 3/4 C
• 2/3 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

The probability of an impossible event is.

• Positive A
• Zero B
• Negative C
• 1 D

F (+∞) is always equal to:

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

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

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

E(x - μ) is equal to:

• E(x) A
• zero  B
• μ C
• X - μ D

F(-∞) is always equal to

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

The probability of drawan any one spade card is.

• 1/32 A
• 1/18 B
• 1/4 C
• 4/13 D

If mean = 25 and variance is also 25, then coefficient of variation is

• 100% A
• 25% B
• 20% C
• 10% D