Question # 1

The difference of the true value of population parameter and corresponding value of sample statistic is called

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non-sampling error

sampling error

random error

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

Confidence intervals which are often used in practice are

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90%

95%

98%

all of these

The most common measurement unit for describing a computer's memory is

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bits

mega bytes

bytes

kilobytes

For an r x c contingency table, the number of degrees of freedom are equal to:

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rc

r + c

(r-1)+(c-1)

(r-1)(c-1)

Total probability under the normal curve is

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1

0

-1

∞

Which one is called as a set of electronic instructions ?

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hardware

software

hardcopy

softcopy

Which hypothesis is always in an inequality form?

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Simple hypothesis

Alternative hypothesis

Null hypothesis

Composite hypothesis

Level of significance is denoted by

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2 - α

3 - α

α

1 - α

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

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

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(B)

(α)

(β)

(A)

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

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classification

trichotomy

dichotomy

association

Sample is a sub-set of ________.

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Population

Data

Set

Distribution

The moment Coefficient of kurtosis is

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β₁

β₂

Zero

m₂

A sample is usually selected by_______.

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With

Without

Finite

Infinite

Points of inflexion of normal curve are at

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μ and σ

x=μ-σ and x=μ+σ

μ and 2σ

μ = o

Which output is permanent ?

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hard copy

real copy

soft copy

none of these

The relationship that describes the dependence of the expected value of the dependent random variable for a given value of the independent non-random variable is called

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equation

relation

ratio

regression

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