Question # 1

The probability density function has ------------------ value for every value of x.

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negative

positive

minimum

maximum

The population must be defined in terms of

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content

unit

extent

all of these

Sample is a sub-set of ________.

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Population

Data

Set

Distribution

Small sample has less than

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50 values

45 values

30 values

35 values

n = (A) + --------------------

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(B)

(α)

(β)

(A)

If mean of the sampling distribution is equal to the parameter then the estimator will be

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biased

consistent

sufficient

unbiased

A statistical hypothesis is an assertion or conjecture about the distribution of random variables

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one

two

one or more

three

An example in a two-sided, alternative hypothesis is:

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H₁ :u < 0

H₁ : u > 0

H₁ L u > 0

H₁ : u ≠ 0

For a least squares linear trend=ŷ= a + b x,

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Σy <Σŷ

Σŷ = 0

Σy =Σŷ

none of these

P ( | Z | > a) =

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2ø(a) - 1

ø(a)

2 ø (-a)

1-ø(a)

CD-ROM is a type of

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hard disk

soft disk

floppy disk

optical disk

The additive model of the time series is:

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Y = T + S + C + I

TSCI

Y = a + bX

Y = a + bX + cX²

Types of statistical inferences are

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one

two

three

four

The shape of the chi-square distribution depends upon_________.

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Parameters

Number of cells

Degrees of freedom

Standard deviation

A process by which we estimate the value of dependent variable on the basis of one or more independent variable is called_________.

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Residual

Correlation

Regression

Slope

Level of significance is also called:

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Power of the test

Size of the test

Level of confidence

Confidence coefficient

Random sampling provide reliable ______.

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Samples

Units

Estimates

Frame

In the measurement of secular trend the moving averages:

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Give the trend in a straight line

Measure the seasonal variations

Smooth out a time series

None of these

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