Question # 1

If the sum of the product of deviations of x and y series from their means is zero, the correlation coefficient will be

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1

-1

0

None of these

The index numbers are calculated in

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Decimal

Ratios

Percentages

Option "A" and "B"

The number of tally count for each value is its

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Range

Frequency

Class boundaries

Class mark

A well defined collection of distinct objects is called

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Probability

Chance

Element

A set

An estimator is always is

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Constant

Variable

Parameter

Statistic

Data are classified according to one characteristic, called

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One-way classification

Tabulation

Single classification

Documentation

When each outcome of a sample space is as likely to occur as any other, the outcomes are called

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Mutually exclusive

Exhaustive

Equally likely

None of these

The probability distribution of a discrete random variable is usually written with the help of a function, called its

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Formula

Variable

Random variable

Discrete variable

A population consists of unlimited number of elementary units

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Continuous population

Finite population

Infinite population

Mix population

In the study of two attributes, n =

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B +α

(AB) + (AB)

AB + (αB)

(A) + (α)

In tabulation, row captions are also called

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Stub

Box-head

Body

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

A set containing only one element is called

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Disjoint set

Singleton set

Universal set

Proper set

The probability of a type 1 error is

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Alpha

beta

Power curve

None of these

The difference between the expected value of a statistic and the true value of the parameter being estimated is called

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Accuracy

Error

Precision

Bias

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

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Mean deviation

Quartile deviation

Standard deviation

Range

The most frequent value in a data set is called

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Mean

Median

Mode

Quartile

The first moment about mean is equal to

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Mean

Zero

Median

Mode

If A denote that the object possesses the attribute A, thenα, means

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β

Notβ

Notα

Not A

First-hand collected data is called

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primary data

secondary data

grouped data

ungrouped data

When a pair of dice is rolled, the sample space consists of

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6 outcomes

36 outcomes

12 outcomes

24 outcomes

If r = 1 or -1, the regression lines are

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Parallel

Inclined at the angle <

Perpendicular

None of these

Bias is

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Non random error

Option A & C

Cumulative

None of these

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

The cyclical fluctuations are

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Long term oscillation

Short term oscillation

Secular oscillation

None of these

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

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Signal

Noise

Response

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

The simplest form of the continuous distribution is the

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Discrete uniform distribution

Probability mass function

Density function

Continuous uniform distribution

A computer stores instructions in

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English language

Octal Number System

Binary Number System

Decimal Number System

In chain base method, the base period is

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Fixed

Not Fixed

Constant

None of these

A combination of characters, numbers and symbols for specific purpose is called

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Bytes

Data

MB

None of these

More Classes

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