Question # 1

If E (X) = 1.6 and E (Y) = 0.4, then E (X - Y) =--------------

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1.2

-0.2

2.0

None of these

Sum of random errors is equal to:

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Zero

2

3

None of these

Statistic is a characteristic calculated from

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Population data

Sample data

Arrayed data

Fictitious data

The median of A,S,S,O,C,I,A,T,E is:

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S

O

I

None of them

The difference of the true value of parameter and corresponding value of sample is called

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Non-sampling error

Sampling error

Random error

None of these

The most commonly used mathematical method for measuring trend is

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Moving average method

Semi-average method

Method of least squares

Free- hand curve method

The value of correlation co-efficient lies between

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0 to +1

-1 to 0

-0.5 to +0.5

-1 to +1

if m = 130, X̂ = 150,s = 5,n =10, what test statistic is appropriate?

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Z

t

X²

F

A variable which takes measurable values is called a

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Constant

Discrete variable

Continuous variable

Qualitative variable

If 'c' is a non-random variable then E(c) is:

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Zero

C

Two

None of these

The total angle of pie chart is:

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90^o

1800^o

360^o

270^o

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