Question # 1

r_xy -------------- r_yx

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=

<

>

≠

The difference of the true value of population parameter and corresponding value of sample statistic is called

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non-sampling error

sampling error

random error

none of these

The rise and fall of a time series periods longer than one- year is called.

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Secular trend

Seasonal variation

Cyclical variation

Irregular variation

A complete computer system has________ parts.

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2

3

4

5

Suppose that the null hypothesis is true and it is rejected, is known as:

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α type-I error, and its probability is β

α type-I error, and its probability is α

α type-II error, and its probability is α

α type-II error, and its probability is β

A relationship where the flow of the data points is best represented by a curve is called_______.

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Linear positive

Linear negative

Linear relationship

Nonlinear relatiobship

If Ho: μ <μoand H1:μ <μoand level of significance is=α then Ho will be rejected if

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Z < Z=α

Z < Z=α/2

Z < Z 1-α

Z < Z1-α/2

In case of normal distribution maximum value of ordinate is

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μ

Zero

The shape of the normal distribution is like

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J.

L

bell

circle

The Quartile deviation (Q.D) of a normal distribution is_______.

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4/5 σ

5/4 σ

2/3 σ

None of these

Joystick is an example of:

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Input devices

Output devices

Processing devices

Storage devices

In time series seasonal variations can occur within a period of:

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Nine years

Four Years

Three years

One year

Sampling in which a sampling unit can be selected more than once is called

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simple sampling

sampling with replacement

sampling without replacement

none of these

A ---------------- error is made by accepting H_o if H₁ is actually true

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type - I

type - II

type - III

type - IV

If the null hypothesis is false, we many accept it leading to a ----------- decision

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true

correct

wrong

none of these

Commonly used input device is

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pen

keyboard

monitor

joystick

The unsystematic sequence which follows irregular pattern of variations is called:

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Noise

Signal

Linear

Non-linear

For a 3 x 3 contingency table, the number of cells in the table are _________.

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3

4

6

9

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