Question # 1

The mean deviation (M.D) of a normal distribution is ________.

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4/5 σ

5/4 σ

2/3 σ

None of these

Normal distribution is

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unimodal

bimodal

trimodal

multimodal

The total area under the normal curve is________.

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Zero

Equal

Unity

True

All odd order moments about mean are

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unique

zero

different

one

The moment Coefficient of kurtosis is

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β₁

β₂

Zero

m₂

Second moment about mean is also called

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mean

variance

skewness

standard deviation

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β₁

β₂

β₃

S_k

In a normal distribution,_____= μ + 0.64745 σ

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Q₁

Q₃

μ

σ

P ( | Z | > a) =

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2ø(a) - 1

ø(a)

2 ø (-a)

1-ø(a)

The shape of the normal distribution is like

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J.

L

bell

circle

Total probability under the normal curve is

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1

0

-1

∞

The probability density function has ------------------ value for every value of x.

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negative

positive

minimum

maximum

Points of inflexion of normal curve are at

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μ and σ

x=μ-σ and x=μ+σ

μ and 2σ

μ = o

The normal distribution is a _______.

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Positive

Negative

Discrete

Continuous

The normal distribution is --------------------distribution.

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positively skewed

negatively skewed

symmetrical

peaked

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

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4/5 σ

5/4 σ

2/3 σ

None of these

Normal distribution ranges from_______.

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1,2,3,............∞

-∞ to +∞

1,2,3,.........n

None of these

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