Question # 1

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

A hypothesis that specifies all the value of parameter is called:

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Statistical hypothesis

Simple hypothesis

Composite hypothesis

None of these

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

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variable

intercept

trend

slope

The graph of time series is called:

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Histogram

Historigram

Straight line

Ogive

A data points falling along a straight line is called______.

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Linear relationship

Non-linear relationship

Linear positive

Scatter diagram

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

If constants are added to or subtracted from the values of the variables, the value of r

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is negative

is positive

is zero

remains unchanged

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

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Time series contains yearly value

Trend is linear

Time series contains odd number of values

None of them

Normal distribution is

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unimodal

bimodal

trimodal

multimodal

The alternative hypothesis always contains the sign of

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equality

inequality

ratio

proportion

If Ho: μ <μoand H1:μ <μoand level of significance is=α then Ho will be rejected if

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Z < Z=α

Z < Z=α/2

Z < Z 1-α

Z < Z1-α/2

A range of values within which the population parameter is expected:

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Confidence interval

Confidence coefficient

Confidence limits

Level of significance

One of the great advantages of sampling is

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waste time

save time

use time

need time

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

A ---------------- error is made by accepting H_o if H₁ is actually true

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type - I

type - II

type - III

type - IV

Level of significance is also called:

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Power of the test

Size of the test

Level of confidence

Confidence coefficient

Super computers can perform more than ---------------- calculations per second ?

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1 million

1 billion

1 trillion

1 lac

The critical region of=χ2distribution is

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χ2 <χ2v; 1-α

χ2 <χ2v;1-α

χ2 <χ2 v;1-α/2

χ2 <χ2v;1-α/2

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