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

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

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Σy <Σŷ

Σŷ = 0

Σy =Σŷ

none of these

The graph of time series is called:

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Histogram

Historigram

Straight line

Ogive

The least squares estimates are unbiased estimates of the

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statistic

time series

parameters

variance

ŷ=a+bx, this line will be called least squares line if it makes=Σ(y-a-bx)2

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maximum

constant

minimum

variable

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 unsystematic sequence which follows irregular pattern of variations is called:

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Noise

Signal

Linear

Non-linear

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

In a straight line equation Y = a + bX; a is the:

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X - intercept

Slope

Y- intercept

None of them

For a least squares linear trend Y = a + bX

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ΣY = ΣY

ΣY = 0

ΣY > ΣY

None of them

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

For a least squares line trend Y = a + bx, the b is the:

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Intercept

Slope

Variable

Trend

The multiplicative time series model is:

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Y = T + S + C + I

TSCI

Y = a + bX

Y = a + bX + cX²

The secular trend is measured by the method of semi-averages when

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time series contains yearly values

trend is linear

time series contains odd number of values

none of these

The graph of a time series is called

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histogram

polygon

straight line

historigram

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

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population

parameter

sample

trend

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ICS Part 2 Statistics Chapter 16 Online Test MCQs With Answers

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