Question # 1

Methods of semi-averages gives an

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accurate result

objective result

authentic result

none of these

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

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variable

intercept

trend

slope

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

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 least squares estimates are unbiased estimates of the

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statistic

time series

parameters

variance

The trend values in freehand curve method are obtained by:

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Equation of straight line

Second degree parabola

Signal

Graph

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

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Nine years

Four Years

Three years

One year

Sum of squares of residuals is denoted by

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∑e

∑e²

∑e³

∑e⁴

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

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

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population

parameter

sample

trend

For a least squares linear trend Y = a + bx, the Σ(Y - Y)² = 0 when:

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All the Y-values are positive

All the Y-values lie on the line

All the Y-values lie above the line

None of these

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

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Noise

Signal

Additive model

Multiplicative model

The sum of deviations=Σ(y-ŷ) =

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0

1

10

-1

The graph of a time series is called

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histogram

polygon

straight line

historigram

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 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 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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