Question # 1

P ( | Z | > a) =

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2ø(a) - 1

ø(a)

2 ø (-a)

1-ø(a)

Second moment about mean is also called

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mean

variance

skewness

standard deviation

In case of normal distribution maximum value of ordinate is

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μ

Zero

Normal distribution ranges from_______.

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1,2,3,............∞

-∞ to +∞

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

None of these

The total area under the normal curve is________.

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Zero

Equal

Unity

True

The normal distribution is a _______.

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Positive

Negative

Discrete

Continuous

The range of a normal distribution is

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—∞ to 1

—∞ to 0

—∞ to + ∞

0 to ∞

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

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negative

positive

minimum

maximum

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β₁

β₂

β₃

S_k

In normal distribution.

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Mean > median > mode

Mean = median = mode

Mean < median < mode

None of these

Total probability under the normal curve is

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1

0

-1

∞

The normal distribution is represented as_______

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N (μ,σ²)

N (n,p)

N (0,σ²)

None of these

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

The maximum ordinate of a normal curve is at X = ________.

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μ

σ

X̅

S.D

The normal distribution is a bell shaped_______ distribution.

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Discrete

Continuous

Symmetrical

Skewed

In a normal distribution,_____= μ + 0.64745 σ

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Q₁

Q₃

μ

σ

For normal distribution mean always lies between.

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Median and mode

Median and Q₁

Median and Q₃

None of these

In case of normal distribution the area to the left of the mean and area to the right of the mean is

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positive

negative

equal

unequal

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

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