Question # 1

The unsystematic sequence which follows irregular pattern of variations is called:

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Noise

Signal

Linear

Non-linear

The following statistic are unbiased estimators:

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The Sample mean

S² = Σ(X - X)²/n-1

The sample proportion

All the above

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y-intercept

x-intercept

slope

none of these

The value of the coefficient of correlation relies between__________.

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-1 and +1

0 and 1

-1 and 0

-0.5 and + 0.5

A process of dividing the objects into two mutually exclusive classes of an attribute is called

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classification

trichotomy

dichotomy

association

The first commercially available computer was:

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ENIAC

UNIVAC

Mark I

Analytical engine

If sampling is done with replacement the σ_p =

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If b_yx = 0.89 and b_xy = 0.75, then r=

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0.89

0.28

0.98

0.82

An automobile is driven on the average on more than 1600 kilometers per year, the null hypothesis is

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H_o : μ = 16000 kilometers

H_o : μ ≤ 16000 kilometers

H_o : μ < 16000 kilometers

H_o : μ > 16000 kilometers

If we reject Ho when Ho is actually true then it is

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type - I error

type - II error

type - III error

type - IV error

The descriptive measure on the sample observation is called ------------------

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parameter

statistic

error

true value

The choice of one-tailed test and two tailed test depends upon:

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Composite hypothesis

Null hypothesis

Alternative hypothesis

Simple hypothesis

If sampling is done without replacement then=σ =

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Sample is a sub-set of ________.

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Population

Data

Set

Distribution

The normal distribution is a bell shaped_______ distribution.

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Discrete

Continuous

Symmetrical

Skewed

The method of least square gives too much weight to extremely large deviations from the

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population

parameter

sample

trend

Level of significance is denoted by

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2 - α

3 - α

α

1 - α

The total area under the curve of chi-square distribution is_______.

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1

0.5

0 to ∞

-∞ to +∞

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