Question # 1

Movement in secular trend

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Smooth

Steady

Regular

All

If a and b are two constants then var (a+ bx) =

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± b var (x)

Var (a) ± var (x)

b² var (x)

(a±b) var (x)

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

In a Binomial prob.Distn it is impossible to find:

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P (X < 0)

P (X = 0)

P( X > 0)

P(0Σ X Σ n

If R_xy = - 0.84 then r_xy is

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-0.84

0.84

0.42

None of these

If Y = -5 -8x and S.D.(X) =3,then S,D (Y) =

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24

8

5

-24

If any ultimate class frequency is negative the data will be

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Inconsistent

Consistent

Correlated

Var (2x + 3) is

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5 var (x)

12 var (x)

4 Var (x)

None of these

A graph of time series is called

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Histogram

Polygon

Straight line

Historigram

How many purpose are served by index numbers?

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2

3

4

5

If y = 5x +10 and x is N(10,25) then mean of y is:

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50

60

70

135

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