Question # 1

The weights used in a price index are.

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Percentage of total price

Average of prices

Quantities

None of these

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4/10

2/10

1/10

0

Variance of binomial distribution is

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np

√npq

npq

nq

β₁ is a quantity

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Dimensional

Dimension less

Positive

Negative

the numebr of possible outcomes in a Bernoulli trial is.

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One

Two

Three

Four

Data in the population Census Reports are.

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Ungrooped data

Secondary data

Primary data

Arrayed data

Variance of σ² is equal E to (Y²) - _______?

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E (y)

[E(y)]²

E(y²)

None of these

Waht is the probability that a ball drawn at random from the bag is.

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0.1

0.4

1.0

Cannot be determined from given information

The base period in fixed base should be

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Current year

Normal year

Highest year

Lowest year

For positive skewed distribution mean _________ Median __________ Mode.

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=

<

>

None of these

When calculating the average rate of debt growth for a company, the correct mean to use is.

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Arithmetic mean

Weigheted arthmetic

Geometric mean

None of these

As the numebr of observations and classes increase, the shape of a frequency polygon.

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Tends to become increasingly asmooth

Tends to become jagged

stays the same

Varies if data become more reliable

When X denotes the number of success in binomial experiment, it is called.

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Random variable

Binomial random variable

Continuous random variable

Both (B) and (C) but not (A)

Variance σ²is equal to E(y²) - --------------------

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E(y)

[E(y)]²

E(y)²

E² (y)

Var (B/aX) =?

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1/aVar(X)

b²/a² Var(X)

b²/a Var(X)

None of these

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y₁ = y₂

Y₁ > y₂

None of these

Random numbers can be generated mechanically by

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By use of digital computers

Probgrammable calculators

Ordinary calculators

Both a and b

the standard deviation is independent of.

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Change of origin

Change of scale of measurement

Change origin and scale of meaturement

None of these

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