Question # 1

A collection of eight bits is called

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Byte

Word

Record

File

The sum of probabilities of a discrete random variable is always

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0

1

Infinity

None of these

Mean deviation about the median is

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Maximum

Minimum

zero

1

A value calculated from sample is called

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Parameter

Variable

Constant

Statistic

A specific value of an estimator computed from the sample data after the sample has been observed is called

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Point estimate

Statistical Inference

Statistic

Parameter

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

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Bytes

Data

MB

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

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

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Parallel

Inclined at the angle <

Perpendicular

None of these

The co-efficient of variation is also called

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Mean deviation

Quartile deviation

Standard deviation

Relative deviation

Quantities which don't vary from individual to individual are called

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Variables

Surveys

Constant

Parameters

The cyclical fluctuations are

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Long term oscillation

Short term oscillation

Secular oscillation

None of these

A sample is a representative part of a

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Continuous

Discrete

Population

Parameter

Indices that involve a group of commodities are referred to as

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Simple indices

Common indices

Aggregate indices

Relative indices

A ___________ is a line or curve that shows the general tendency of a time series.

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Historigram

Seasonal variation

Secular Trend

None of these

The null hypothesis always refers to a specified value of the

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Population parameter

Statistic

Sample statistic

None of these

The degree of relationship between the two attributes is called

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Association

Dichotomy

Variable

None of these

Frequency polygon is a

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Line graph

Bar graph

Circular graph

Rectangle graph

The most common measures of absolute variability are also called

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Range

Measures of spread

Relative measures

Mean deviation

The sum of squares of the deviations of the observation from their mean is

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Minimum

Maximum

Zero

One

Graph of time series is called

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Sector diagram

Ogive

Historigram

None of these

__________ is always greater than or equal to zero

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Range

Standard deviation

Mean deviation

Variance

Rejecting a null hypothesis, when it is true, is called

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Row scale

Simple hypothesis

Type 1 error

Type 2 error

If the critical region is located equally in both tails of the sampling distribution of test statistic, the test is called a

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Two tailed test

One tailed test

Right tailed test

Left tailed test

A descriptive measure on the sample observation is called

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Statistics

Statistic

Survey

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 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 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

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

If "a" and "b" are constants, then E(ax + b) =

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a

a E (x)

E (x)

a E (x) + B

The collecting of information from a part of the population is called making a

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Census

Complete enumeration

Discrete sampling

None of these

In symmetrical distribution, mean, median and mode are

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Equal

Different

Zero

None of these

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