Question # 1

The simple probability of occurrence of an event in called the.

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Joint probability

Conditional probability

Marginal probability

Subjective probability

If Mean = 25 and S² =25 the C.V is

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100%

25%

20%

None of these

The mean of a constant 'a' is

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0

a/2

a²

None of these

The hypergeometric distribution is used when trials are

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Dependent

Independent

Equally likely

Mutually exclusive

When two dice are rolled, the maximum totla on the two faces of dice will be.

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2

6

12

36

the numebr of possible outcomes in a Bernoulli trial is.

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One

Two

Three

Four

The base period in fixed base should be

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Current year

Normal year

Highest year

Lowest year

In a symmetrical distribution Q₁ = 20, Median = 30 the Q₃ is:

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50

40

30

60

If a curve has a longer tail to the left . it is called a.

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Symmetrical curve

Positive skewed curve

Negatively skewed curve

None of these

Weight of whole earth is.

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Discrete variables

Qualitative variable

Constant

Continuous variable

Statistical laws are true.

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On the average

Always

A and C

In the long run

Importance of commodity is its

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Quantity

Quality

Weight

Price

The Area of trapezoid is equal to:

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sum of paralled sides x base

sum of paralled sides x base/2

2 x base x sum of paralled side

Sum of paralled sides x base/4

In a symmetrical distribution the coefficient of skewness is equal to.

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-1

+1

0

None of these

The word statistic was used first time by:

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Yule

Gottifried Achenwall

E.A.W Zimmermann

Baron

F (+∞) is always equal to:

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0

Two

One

None of these

First central moment is always.

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0

1

-1

2

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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