Question # 1

Joystick is an example of:

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Input devices

Output devices

Processing devices

Storage devices

Sample is a sub-set of ________.

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Population

Data

Set

Distribution

If the observations are paired and the number of pairs is n, then the number of degree of freedom is equal to

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n

n - 1

2n

2n - 1

A range of values used to estimate an unknown population parameter is

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a point estimator

An interval estimator

an unbiased estimator

A biased estimator

In a normal distribution,_____= μ + 0.64745 σ

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Q₁

Q₃

μ

σ

If 1-α = 0.90, the value of Z_a/2 is:

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1.645

1.96

2.326

2.575

The probability distribution of proportions is called

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proportional distribution

population distribution

sample distribution

sampling distribution

The most common type of computer memory is called:

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ALU

ENIAC

RAM

ROM

If two attributes A and B are independent, then co-efficient of association is______.

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-1

+1

0

0.5

Screen output is considered as a

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softcopy

hardcopy

screen copy

print copy

Keyboard, mouse and scanner are the ---------- devices

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input

output

logical

mini

The endpoints of a confidence interval are called:

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confidence coefficient

Confidence limits

Error of estimation

Parameters

Non probability form of sampling is

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quota sampling

sampling with replacement

sampling without replacement

none of these

The equation of the quadratic (parabolic) trend is

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ŷ=a+bx

ŷ=a+by

ŷ=a+bΣx+cΣx²

ŷ=a+bx+cx²

The variable, whose resulting value depends upon the selected value of the independent variable is called______.

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Regression

Regressor

Regressand

Coefficient

The basic components of a time series are:

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2

3

4

5

The shape of the normal distribution is like

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J.

L

bell

circle

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