Question # 1

The sum of absolute deviation form median is.

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zero

negative

least

maximum

What is teh major assumption we make when computing a mean from grouped data.

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All values are discrete

Eveery value in a class is equal to the midpoint

No value occurs more than once

Each class contains exactly the same number of values

For a binomial probability distribution:

n = 10 & the probability of failure (q =0.6), then mean of the distribution is .

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0.6

6.0

10

4

If the third moment about mean is zero ( m3 = 0) , then the distribution is.

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Mesokurtic

Positively skewed

Symmetrical

Negatively skewed

The probability of getting an odd number when a balanced die is rolled is.

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1/2

1/3

1/4

1/6

A quantity calculated from a population is called.

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Frequency

Statitics

Parameter

Sample

The purpose of the sample is to draw inference about:

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statistic

Population

Parameter

Primary

If X = 0,2,2,4,8,10, then G.M is.

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4

8

10

zero

In pie diagram, the sector of a circle is obtained by.

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Component part / total x 300

Component part / total x 180

Component part / total x 360

None of these

If x is a random variable with E(x) = 5 then E (3x - 2) =

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0

1

13

15

If the random variable x denotes the number of heads of when three distinct coins are tossed k the X assumes values.

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0,1,2,3

1,3,3,1

1,2,3

1,1,1,1

The data whiich have not undergone any statistical treatment are.

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Primary data

Secondary data

Qualitative data

Discrete data

A quantitative variable whose value are countable is called.

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Categorical variable

Continuous variable

Discrete variable

None of these

The letter μ is

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German

Latin

Greek

None of these

If X and Y are random varaibes, than E ( X - Y) is equal to.

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E(X) + E (Y)

E(X) - E(Y)

X - E (Y)

E(X) - Y

It is the reciprocal of the simple average of teh reciprocal of all the values.

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A.M

G.M

H.M

Mode

If x̅ = 10 and Y = 5 +2x, then Y̅ is.

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5

10

25

15

If x is discrete random variable, then the function f (x) is.

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A probability function

A density function

A probability density function

A distribution function

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