Question # 1

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

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

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Σy <Σŷ

Σŷ = 0

Σy =Σŷ

none of these

The additive model of the time series 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

smoothes out a time series

measure irregular fluctuations

The graph of time series is called:

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Histogram

Historigram

Straight line

Ogive

Sum of squares of residuals is denoted by

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∑e

∑e²

∑e³

∑e⁴

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

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variable

intercept

trend

slope

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

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

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all the y-values lie on the line

all the y-values are positive

all the y-+values lie above the line

none of these

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

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Noise

Signal

Additive model

Multiplicative model

The trend values in freehand curve method are obtained by:

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Equation of straight line

Second degree parabola

Signal

Graph

A business cycle has

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one phase

two phases

three phases

four phases

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

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Nine years

Four Years

Three years

One year

The least squares estimates are unbiased estimates of the

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statistic

time series

parameters

variance

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ICS Part 2 Statistics Chapter 16 Online Test MCQs With Answers

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