Question # 1

A sample is usually selected by_______.

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With

Without

Finite

Infinite

The multiplicative time series model is:

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Y = T + S + C + I

TSCI

Y = a + bX

Y = a + bX + cX²

The process of dividing the objects into two mutually exclusive classes is called_______

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Bichotomy

Trichotomy

Dichotomy

Multichotomy

In case of normal distribution maximum value of ordinate is

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μ

Zero

The graph of time series is called:

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Histogram

Historigram

Straight line

Ogive

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

CD-ROM is a type of

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hard disk

soft disk

floppy disk

optical disk

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 error which arises due to faulty sampling frames and processing of data is called

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random error

sampling error

non-sampling error

systematic error

1MB equals

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1048576 bytes

1024 bytes

2048 bytes

2380 bytes

The values of test statistic which separate the rejection and non rejection regions for the test are called

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simple values

critical values

parametric values

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 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

If r = -1, then there is

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negative correlation

perfect negative correlation

no correlation

average correlation

A specific value of an estimator computed from the sample data is called

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estimation

estimate

interval estimate

point estimate

Estimation is of two types:

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One sides and two sides

Type I and type II

Point estimation and interval estimation

Biased and unbiased

If X - N (50,25), then=σ = ________.

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3

5

25

50

n = (A) + --------------------

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(B)

(α)

(β)

(A)

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