Question # 1

The null hypothesis (H_o) is the hypothesis that is always

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rejected

accepted

zero

tested

Sample mean is a

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Constant

Parameter

Variable

Statistic

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 difference between the upper and the lower class boundaries of a class is called

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Class interval

Class distribution

Frequency

Cumulative frequency

The variance of a constant is

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Constant

Zero

One

None of these

The sum of probabilities of events of a sample space is always

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Zero

One

Two

Infinity

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 unit of frequency is

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Hertz

Bytes

Mega bytes

None of these

A descriptive measure on the sample observation is called

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Statistics

Statistic

Survey

None of these

Primary data and ungrouped data are

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Same

Opposite

Not same

Proportional

Recording the time (minutes) taken by the customers to wait for its turns in a utility store while standing in a queue, is an example of

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Discrete variable

Continuous variable

Constant

Parameter

The heading for different rows are called

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Footnotes

Prefatory note

Stub

None of these

The graph of the time series is called

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Histogram

Pie chart

Bar diagram

Historigram

We refer the difference between the sample result and the true value as

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Accuracy

Error

Precision

Bias

The purpose of simple linear regression analysis is to

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Replace points on a scatter diagram by a straight line

Measure the degree to which two variables are linearly associated

Predict one variable from another vaiable

None of these

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

If any value in the data set is zero, then it is not possible to compute

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H.M

A.M

Median

Mode

The entries in different cells of columns and rows in a table are called

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Body of the table

Captions

Stub

Prefatory notes

G.M becomes zero if any of the observation is

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zero

1

similar

Opposite

The sum of probabilities of a discrete random variable is always

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0

1

Infinity

None of these

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

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6 outcomes

36 outcomes

12 outcomes

24 outcomes

1 GHz equals to

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1024 Hz

10⁴MHz

10²MHz

1024 MHz

Mean deviation is always

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Greater than S.D

Less than S.D

Equal to S.D

Negative

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

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Population growth

Law suits

Holidays

Recessions

In normal probability distribution, all odd order moments about mean are

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zero

one

maximum

none of these

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

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Zero

One

Undefined

Negative

The frequency of classes of the highest order are called

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Consistence of frequencies

Ultimate class frequencies

Independence of attributes

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

Graph of time series is called

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Sector diagram

Ogive

Historigram

None of these

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