Question # 1

The unsystematic sequence which follows irregular pattern of variations is called:

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Noise

Signal

Linear

Non-linear

For a least squares linear trend Y = a + bX

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ΣY = ΣY

ΣY = 0

ΣY > ΣY

None of them

For a least squares linear trend=ŷ= a + b x,

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Σy <Σŷ

Σŷ = 0

Σy =Σŷ

none of these

A business cycle has

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one phase

two phases

three phases

four phases

The multiplicative time series model is:

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Y = T + S + C + I

TSCI

Y = a + bX

Y = a + bX + cX²

In the measurement of secular trend the moving averages:

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Give the trend in a straight line

Measure the seasonal variations

Smooth out a time series

None of these

For a least squares linear trend=ŷ = a + bx, b is the

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variable

intercept

trend

slope

The sum of deviations=Σ(y-ŷ) =

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0

1

10

-1

The straight line is fitted to a time series when the movements in the time series are

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linear

quadratic

cubic

constant

The equation of the quadratic (parabolic) trend is

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ŷ=a+bx

ŷ=a+by

ŷ=a+bΣx+cΣx²

ŷ=a+bx+cx²

The graph of time series is called:

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Histogram

Historigram

Straight line

Ogive

Methods of semi-averages gives an

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accurate result

objective result

authentic result

none of these

Which one is a rough and crude method for measuring secular trend ?

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free hand curve method

semi average method

moving averages method

least square method

The rise and fall of a time series periods longer than one- year is called.

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Secular trend

Seasonal variation

Cyclical variation

Irregular variation

The systematic components of time series which follow regular pattern of variations are called:

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Noise

Signal

Additive model

Multiplicative model

In time series seasonal variations can occur within a period of:

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Nine years

Four Years

Three years

One year

The method of least square gives too much weight to extremely large deviations from the

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population

parameter

sample

trend

The basic components of a time series are:

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2

3

4

5

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ICS Part 2 Statistics Chapter 16 Online Test MCQs With Answers

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