2nd Year Statistics Chapter 10 Online MCQ Test for 12th Class Statistics Chapter 10 (Normal Distribution)

All odd ordered moments about mean are ______ in a normal distribution.

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

In case of normal distribution maximum value of ordinate is

• μ A
• Zero B
• 
  C
• 
  D

Points of inflexion of normal curve are at

• μ and σ A
• x=μ-σ and x=μ+σ B
• μ and 2σ C
• μ = o D

μ - 2σ to=μ + 2σ contains approximately_______ area.

• 75% A
• 50% B
• 95.45% C
• 99.73% D

Second moment about mean is also called

• mean A
• variance B
• skewness C
• standard deviation D

If X - N (50,25), then=σ = ________.

• 3 A
• 5 B
• 25 C
• 50 D

Normal distribution is

• unimodal A
• bimodal B
• trimodal C
• multimodal D

In a normal distribution,_____= μ + 0.64745 σ

• Q₁ A
• Q₃ B
• μ C
• σ D

In normal distribution.

• Mean > median > mode A
• Mean = median = mode B
• Mean < median < mode C
• None of these D

P ( | Z | > a) =

• 2ø(a) - 1 A
• ø(a) B
• 2 ø (-a) C
• 1-ø(a) D

The point of inflection in normal distribution are _______.

• μ - σ, μ + σ A
• μ - σ, μ + 2σ B
• μ, σ C
• None of these D

The Quartile deviation (Q.D) of a normal distribution is_______.

• 4/5 σ A
• 5/4 σ B
• 2/3 σ C
• None of these D

The moment coefficient of skewness is

• β₁ A
• β₂ B
• S_k C
• m₃ D

P(μ-2σ < X=< μ + 2σ)=

• 0.6827 A
• 0.9545 B
• 0.9973 C
• 0.9827 D

The normal distribution is a _______.

• Positive A
• Negative B
• Discrete C
• Continuous D

• β₁ A
• β₂ B
• β₃ C
• S_k D

The total area under the normal curve is________.

• Zero A
• Equal B
• Unity C
• True D