Question # 1

If constants are added to or subtracted from the values of the variables, the value of r

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is negative

is positive

is zero

remains unchanged

(1-α) is called:

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Critical value

Level of significance

Level of confidence

Interval estimate

One byte equal:

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4 bits

6 bits

8 bits

12 bits

The normal distribution is a bell shaped_______ distribution.

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Discrete

Continuous

Symmetrical

Skewed

In a normal distribution β₁ = 0 and β₂ = __________.

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2

4

3

5

A statistic on the basis of which a decision is made about the hypothesis of interest is called

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critical region

test statistic

parameter

rejection region

Total probability under the normal curve is

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1

0

-1

∞

Monitors, PC projectors and sound systems are

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soft copy output devices

real copy output devices

raw copy output devices

hardcopy output devices

The secular trend is measured by the method of semi-averages when

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time series contains yearly values

trend is linear

time series contains odd number of values

none of these

Commonly used input device is

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pen

keyboard

monitor

joystick

The most common type of computer memory is called:

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ALU

ENIAC

RAM

ROM

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 shape of the normal distribution is like

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J.

L

bell

circle

P(type II error) is equal to:

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α

β

1 - α

1 - β

Joystick is an example of:

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Input devices

Output devices

Processing devices

Storage devices

For a least squares linear trend Y = a + bX

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ΣY = ΣY

ΣY = 0

ΣY > ΣY

None of them

The ___________ allow you to type information into the computer.

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Mouse

Scanner

Printer

Keyboard

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

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