Question # 1

The number used to describe classes in a frequency distribution are called

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Class limits

Relative frequency

Cumulative frequency

Width of class

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

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Minimum

Maximum

Zero

One

Which of the following is/are unbiased estimators

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Sample mean

Sample proportion

Sample variance

All of these

In symmetrical distribution, mean, median and mode are

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Equal

Different

Zero

None of these

A symmetrical distribution has mean equal to 4. Its mode will be

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Less than 4

Equal to 4

Greater than 4

None of these

Data are classified according to one characteristic, called

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One-way classification

Tabulation

Single classification

Documentation

Lack of symmetry is called

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Dispersion

Moment

Skewness

Kurtosis

_______ is a quantity computed from a population when the entire population is available.

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Variables

Surveys

Ratio

Parameters

Binomial distribution has two

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Variables

Constants

Parameters

None of these

Relative measures have no

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Negative values

Decimal values

Units

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 graph of the time series is called

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Histogram

Pie chart

Bar diagram

Historigram

The difference between the highest and lowest values in a population is called

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Range

Variance

Mean deviation

Standard deviation

First-hand collected data is called

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primary data

secondary data

grouped data

ungrouped data

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

The statistical estimation of population is divided into

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two types

Three types

cannot divided

None of these

Which one of the following is an example of seasonal variation

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An increase in consumption of electricity in summer

A steel strike, delaying production for a week

A continually increasing demand for smaller automobiles

None of these

Graph of time series is called

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Sector diagram

Ogive

Historigram

None of these

Which of the following would likely be a seasonal component of a time series

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Holidays

Population growth

Law suits

None of these

Probaility of an event cannot be

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Positive

One

Negative

None of these

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

G.M becomes zero if any of the observation is

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zero

1

similar

Opposite

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

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Variables

Surveys

Constant

Parameters

A sample is a part of

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Universe

Mean

Median

Mode

A set containing only one element is called

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Disjoint set

Singleton set

Universal set

Proper set

Computer memory

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Performs all calculations

Receives input data

is extremely limited

is better than human memory

A sample is a representative part of a

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Continuous

Discrete

Population

Parameter

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