Question # 1

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

Sum of squares of residuals is denoted by

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∑e

∑e²

∑e³

∑e⁴

The least squares estimates are unbiased estimates of the

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statistic

time series

parameters

variance

For a least squares linear trend Y = a + bX

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ΣY = ΣY

ΣY = 0

ΣY > ΣY

None of them

In the measurement of secular trend the moving averages

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give the trend in a straight line

measure the seasonal variations

smoothes out a time series

measure irregular fluctuations

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

Methods of semi-averages gives an

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accurate result

objective result

authentic result

none of these

The basic components of a time series are:

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2

3

4

5

Increase the number of patients in the hospital due to heel stock is:

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Seasonal trend

Secular trend

Cyclical movements

Irregular variation

The graph of time series is called:

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Histogram

Historigram

Straight line

Ogive

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

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Intercept

Slope

Variable

Trend

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

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

A business cycle has

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one phase

two phases

three phases

four phases

The sum of deviations=Σ(y-ŷ) =

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0

1

10

-1

The multiplicative time series model is:

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Y = T + S + C + I

TSCI

Y = a + bX

Y = a + bX + cX²

In moving average method, we cannot find the trend values of some:

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Middle periods

End periods

Starting periods

Between extreme periods

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Statistics Ics Part 2 Chapter 7 Online Test MCQs With Answers

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