Question # 1

Another name of probability sampling is

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quota sampling

simple sampling

stratified sampling

random sampling

___________ is a set of electronic instructions:

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Hardware

Software

Hard disk

Compact disk

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

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Noise

Signal

Additive model

Multiplicative model

CD-ROM is a type of

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hard disk

soft disk

floppy disk

optical disk

The population must be defined in terms of

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content

unit

extent

all of these

If the population is finite, the standard error of mean is given by:

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σ/√n

σ/√n √N - n/ N-1

σ/√n √N -1/N-n

σ/√ √1 - n /N

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 point of inflection in normal distribution are _______.

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μ - σ, μ + σ

μ - σ, μ + 2σ

μ, σ

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

Smooth out a time series

None of these

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Φ²

q²

α²

β²

Regression line x on y is

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Second moment about mean is also called

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mean

variance

skewness

standard deviation

RAM is called_______storage.

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Primary

Secondary

Control

Scanner

The difference of upper and lower limits of confidence interval measures the

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level of significance

level of confidence

interval

precision

For a 3 x 3 contingency table, the number of cells in the table are _________.

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3

4

6

9

Normal distribution is

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unimodal

bimodal

trimodal

multimodal

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