Question # 1

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

A sample is a part of

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Universe

Mean

Median

Mode

The part of the table containing row captions is called

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Stub

Row captions

Box-head

Row-head

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

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Parallel

Inclined at the angle <

Perpendicular

None of these

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

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Row scale

Simple hypothesis

Type 1 error

Type 2 error

In symmetrical distribution, mean, median and mode are

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Equal

Different

Zero

None of these

_________ is the maximum variance unbiased estimator of the population variance

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Estimator

Statistic

Sample mean

All of these

Frequency polygon is a

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Line graph

Bar graph

Circular graph

Rectangle graph

Which of the following is/are unbiased estimators

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Sample mean

Sample proportion

Sample variance

All of these

Link relatives are not directly comparable because they have

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Fixed base

Not fixed base

Zero values

None of these

A descriptive measure on the sample observation is called

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Statistics

Statistic

Survey

None of these

The most frequent value in a data set is called

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Mean

Median

Mode

Quartile

1 GHz equals to

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1024 Hz

10⁴MHz

10²MHz

1024 MHz

If P(B) = 0, then the conditional probability is

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zero

1

undefined

-1

In continuous distribution, P(y=a) and P(y= b) is always

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Zero

One

Undefined

Negative

When statistics is applied in Economics, it is called:

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Psychometry

Econometrics

Economistics

Trigonometrics

Lack of symmetry is called

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Dispersion

Moment

Skewness

Kurtosis

The two attributes A and B are independent, if the co-efficient of association

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Equals to one

Equals to zero

Not equals to zero

None of these

In chain base year method, the _________ is fixed

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Year

Price

Quantity

Price and quantity

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

__________ is always greater than or equal to zero

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Range

Standard deviation

Mean deviation

Variance

Computer memory

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Performs all calculations

Receives input data

is extremely limited

is better than human memory

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

A.M is _______ affected by extreme values

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Not

Highly

Less

None of these

A sample statistic that is used to estimate the unknown true value of a population parameter is called

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Point estimator

Interval estimator

Testing of hypothesis

None of these

The number of tally count for each value is its

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Range

Frequency

Class boundaries

Class mark

The main function of a computer is

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Data storage

Speed

Data Processing

None of these

The sum of probabilities of a discrete random variable is always

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0

1

Infinity

None of these

The cyclical fluctuations are

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Long term oscillation

Short term oscillation

Secular oscillation

None of these

The probability of a type 1 error is

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Alpha

beta

Power curve

None of these

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