Question # 1

The base period in fixed bases should be________

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A normal year

Abnormal year

Special

General

Why is it necessary to square the difference from the mean when computing the standard deviation.

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So that the extreme values will not affect the calculation

Some of the differnece will be positive and some will e negative

It can change drastically from one data set to the next

It is determined by only two points in the data set

A frequency polygon is clsed figure which is.

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One sided

Two sided

Three sided

Many sided

Data in the population Census Reports are.

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Ungrooped data

Secondary data

Primary data

Arrayed data

If n is the number of elements of a set. the total numebr of subsects of this set in

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2n

n2

2ⁿ

n

E(x) = Σxf(x) if it ________ absolutely.

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Equal

Converges

Discrete

None of these

Code method of calculation is only used in:

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Median

Combined mean

A.M

None of these

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

Smoking habits of residents of a city are.

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Qualitative data

Quantitative data

Discrete data

Continuous data

If an index numebr calculation over 8 years with a base value of 100 gave an index for 1992 of 110, what would be the percentage relative for 1993.

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90.0

13.75

880

110

The probability of getting two red balls with replacement from a bag containing 4 red, 3 white and 3 black balls is.

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4/25

1/25

9/100

2/25

Mean deviation is always.

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Less then S.D

Equal to S.D

More than S.D

Negative

Fist moment about origin in is always equal

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Mean

Variance

Zero

1(One)

If (E(X) = E than find arithmetic means will be.

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1

4

0

8

A graph of cumulative frequency is called:

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Histogeram

Frequency polygon

Ogive

Frequency curve

The life time of fans, data is.

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Discrete

Continuous

Unchanged

Qualitative

A four die is rolled three times. the probabiliyt of getting three area is.

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1/4

1/6

1/216

1/27

The parameters of hypergeometric distribution are:

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n,k & p

n, k & q

n, p & q

n, k & N

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