Question # 1

50^th percentile is also called as

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Mean

Mode

Average

Median

A random variable is also called.

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Chance variable

Stochastic variable

Discrete variable

Both A and B

If x is discrete random variable, then the function f (x) is.

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A probability function

A density function

A probability density function

A distribution function

The probabilyt density function p (x) cannot exced.

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zero

One

Mean

Infinity

the numebr of possible outcomes in a Bernoulli trial is.

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One

Two

Three

Four

If X and Y are independent, than Var ( X -Y) is equal to.

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Var (X) + Var (Y)

Var (X) - Var (Y)

Var (X+ Y)

Zero

For a binomial probability distribution:

n = 10 & the probability of failure (q =0.6), then mean of the distribution is .

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0.6

6.0

10

4

For Laptokurtic distribution.

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b2 > 3

b2 < 3

b2 = 3

b1 > 3

Importance of commodity is its

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Quantity

Quality

Weight

Price

Continuous data are differentiated from discrete data in that.

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Discrete data classes are represented by fractions

Continuous data classes may be represented by fractions

Continuous data take on only whole numbers

Discrete data can take on any real number

In the grouped data , the range is the difference between.

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Two extreme class frequency

Two extreme class limits

Tow extreme class boundaries

None of these

The hypergeometric distribution is used when trials are

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Dependent

Independent

Equally likely

Mutually exclusive

Mean deviation = S.D

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2/3

4/5

5/6

6/5

First hand collected data are called:

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secondary

Primary

Constant

Discrete

A portion of populatin selected for study is called.

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Parameter

Statistic

Population

Sample

Second moment abut mean is.

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0

1

variance

Standard deviation

The index number given by formula Σp_nq_n/Σp_nq_n x100 is:

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Laspeyres index

The paasche's index

The value index

None of these

Which of the followingindices satisfies both the time reversal and factor reversal tests.

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Fisher's method

Paasche's method

Laspeyres method

None of these

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