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

E(y-μ) is equal to

• E(y) A
• μ B
• zero C
• y-μ D

The simplest form of the continuous distribution is the.

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

A lettter is chosen at random from the word STATITICS , The probability of getting a vowel is.

• 1/5 A
• 3/10 B
• 1/2 C
• 2/5 D

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

The probability of red card out of 52 cards is.

• 1/4 A
• 1/2 B
• 4/52 C
• zero D

Which of the following is suitable for discrete probability distribution.

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

The probability of drawing two acea from apack of 52 cards with replacement is.

• 1/169 A
• 1/10 B
• 1/4 C
• 1/256 D

The range of probability is between

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

Hourly temperature recorded by weather brave is the example of:

• Discrete variable A
• Continuous variable B
• Qualitative C
• Both A and B D

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

• 3/8 A
• 1/2 B
• 1/8 C
• 1/4 D

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

• 1/2 A
• 1/4 B
• 3/4 C
• 1 D

The sum of probabilities of events of a sample space is always.

• Equal A
• Discrete B
• Continuous C
• Always greater then oen D

 Var (3x+2)

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

Variance σ² is equal to E(y²) -  --------------------

• E(y) A
• [E(y)]² B
• E(y)² C
• E² (y) D

The probability of an event connot be.

• = 0 A
• > 0 B
• =1 C
• < 0 D

the collection of all possible outcome of a random experimnet is called.

• Sample point A
• Sure event B
• sample event C
• simple event D