Question # 1

If x is a continuous random vriable, then the function f (x) is.

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A probability function

A probability denaity function

A density function

Both b and c

If the values in a sereis are not of equal importance, we compute the.

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Median

Mean

Weighted mean

Harmonic mean

Moment ratios b1 and are.

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Expressed in original unit of the data

Dimensionless quantities

Independent of origin and scale of messurement

Both b and c

In binomial distribution, the random variable has a range:

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0,1,2...................n

0,1,2,......+∞

-∞ to +∞

∞ to +0

A fair aid is rolled, the sample space consists of:

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2 outcomes

6 outcomes

36 outcomes

None of these

The probability of success changes from trial to trial, is the property of:

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Binomial experiment

Hypergeometric experiment

Both A and B

None of these

If x and y are independent random variables, then E(xy)

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E(xy)

xE(y)

E(x)

E(x)E(y)

If in binomial distribution, μ = 6, p = 3/5, the number of trial are:

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18

30

10

None of these

For a symmetrical distribution.

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B1 = 0

B1 = 3

B2 = 3

B3 = 3

An Ogive is a

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Frequency curve

Frequency polygon

Cumulative frequency polygon

Frequency histogram

Which of the following is not based upon all the observations.

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A.M

G.M

H.M

Mode

Which one is not an example of random experiments.

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A coin is tossed and the outcome is either a head or a tail

A six sided aid is rolled

All medical insurance clams received by a company in a given year.

Some one of person will be admitted to a hospital emergency room during any hour.

Which pair of measures cannot be calculated when one of numbers in the seriesis zero.

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G.M and A.M

G.M and H.M

H.M and A.M

None of these

Which is a poor measure of dispersion in open-end distribution.

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Range

Standard deviation

Variance

A.M

The number 5.0435001 rounded off to nearest thousandth is.

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5.043

5.044

5.050

5.000

Mean deviation is always.

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Less then S.D

Equal to S.D

More than S.D

Negative

Which set has teh maximum varaition?

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46,48,50

30,40,50

40,50,60

48,48, 49

For a certain distribution if Σ(x -10) = 5, Σ(x -20) =18 & Σ(x -15) = 0 then the value of Σ is.

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10

15

20

25

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