Question # 1

A collection of eight bits is called

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Byte

Word

Record

File

The arrangement of data in order of magnitude is called

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Order statistic

Parameter

Ratio

Parameters

The sum of probabilities of a discrete random variable is always

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0

1

Infinity

None of these

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

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Mean deviation

Quartile deviation

Standard deviation

Range

The part of the table containing row captions is called

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Stub

Row captions

Box-head

Row-head

The statement of the alternative hypothesis never contains a(n) ________ sign regarding the specified value of the parameter

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equal

greater than

less than

None of these

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

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8

5

2

1

The probability of a type 1 error is

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Alpha

beta

Power curve

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

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

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 main function of a computer is

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Data storage

Speed

Data Processing

None of these

The height of students, between 5.0 and 5.9 feet, is an example of

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Discrete variable

Continuous variable

Constant

Parameter

The two regression lines are perpendicular to each other if

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r = 1

r = 0

r = -1

None of these

Computer memory

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Performs all calculations

Receives input data

is extremely limited

is better than human memory

Statistical laws are true

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On the average

In each case

In long run

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

The graph of the time series is called

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Histogram

Pie chart

Bar diagram

Historigram

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

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6 outcomes

36 outcomes

12 outcomes

24 outcomes

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

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Signal

Noise

Response

None of these

The hypergeometric model is applied when samples are taken or selections are made, from a finite population

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With replacement

Without replacement

With parameters

None of these

In the study of two attributes, (B) =

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(Aβ) + (αB)

(AB) + (Aβ)

(B) + (β)

(AB) + (αβ)

_________ is the maximum variance unbiased estimator of the population variance

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Estimator

Statistic

Sample mean

All of these

In symmetrical distribution, mean, median and mode are

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Equal

Different

Zero

None of these

The first moment about mean is equal to

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Mean

Zero

Median

Mode

The Greek lettersα ,β ....... are used to denote the ________ of A,B,C ............

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Presence

Inverse

Absence

None of these

The statistical estimation of population is divided into

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two types

Three types

cannot divided

None 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

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

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Row scale

Simple hypothesis

Type 1 error

Type 2 error

Population parameters are estimated from

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Sample data

Whole data

Estimator

Population interval

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

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Parallel

Inclined at the angle <

Perpendicular

None of these

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