Question # 1

If the two regression coefficients are 0.8 and 0.2, then coefficient of correlation r is

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0.4

-0.4

1.6

None of these

In normal probability distribution, all odd order moments about mean are

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zero

one

maximum

none of these

An estimator is always is

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Constant

Variable

Parameter

Statistic

Exponential smoothing requires

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Past values of the time series

Current values of the time series

Both past and current values of the time series

Estimation of a time trend regression

The number of pulses generated is one second is called _______

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Accuracy

Frequency

Hertz

Data

The shape of binomial distribution depends upon the value of its

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Constants

Parameters

Variables

Integers

The positive square root of the variance is refered to as the

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Mean deviation

Quartile deviation

Standard deviation

Range

The sum of probability of success and probability of failure in a binomial probability distribution is always

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Zero

One

Less than 1

Greater than 1

For a two tailed test of hypothesis at alpha = 0.10, the acceptance region is the entire region

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To the right of the critical value

Between the two critical values

Outside of the two critical values

To the left of the positive critical value

The probability density function of a continuous random variable Y is specified by a

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straight line

Rectangle

Smooth curve

Circle

The heading for different rows are called

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Footnotes

Prefatory note

Stub

None of these

Geometric mean of 0, 5, 1, 4, 8 is

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8

5

2

1

A sample is a part of

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Universe

Mean

Median

Mode

A.M is _______ affected by extreme values

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Not

Highly

Less

None of these

The probability distribution of a discrete random variable can be described with the help of a two

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Rows table

Column table

Circles

Curves

Binomial distribution has two

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Variables

Constants

Parameters

None of these

Which of the following is not a hardware

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Compiler

CPU

Chip

Memory unit

The point in time at which the selected number was measured is referred to as the

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Index number

Base period

Relative price

Weighted Index

A variable whose values depend upon the outcomes of a random experiment is called a

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Constant

Parameter

Random variable

Continuous variable

Mean is highly affected by

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Even values

Odd values

Zero values

Extreme value

The _______ is an irregular component of variation in a time series

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Signal

Noise

Response

None of these

The attributes denoted by A, B, ................ are called

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Positive attributes

Negative attributes

Contingency attributes

None of these

The measures of dispersion are changed by a change of

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Origin

Scale

Algebraic sign

None of these

The process of making tables or arranging data into rows and columns is called

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Classification

Tabulation

Information

Arrangement

Mean deviation about the median is

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Maximum

Minimum

zero

1

The heights of all the students enrolled at a college in a given year, is an example of

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Infinite population

Finite population

Discrete sampling

None of these

The two regression lines are perpendicular to each other if

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r = 1

r = 0

r = -1

None of these

Probability sampling is also called

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Random sampling

Discrete sampling

Continuous sampling

Standard error

A set consisting of all the elements of the sets under consideration is called the

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Universal set

Disjoint set

Overlapping set

Proper set

Level of satisfaction is

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Continuous

Discrete

Population

Qualitative

A time series of annual data can contain which of the following components

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Secular Trend

Cyclical fluctuation

Seasonal variation

(A) and (B) only

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