Question # 1

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 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

Second moment about mean is called

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Standard deviation

Mean deviation

Variance

Coefficient of variation

Which measure of disperesion is considered as the best genereal purpose measure of dispersion.

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Range

Semi interquartile range

Standard deviation

Mean deviation

If a curve can be divided into two parts that are marror images,it is called a.

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Skewed curve

Symmetrical curve

J-Shaped curve

Frequency curve

The number of terms in the expansion of the binomial (p+q)ⁿ is.

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n

n-1

n+1

2n

The properties of discrete probability distribution are:

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Σp (x) = 1 and Σx. (x) = 1

ΣP (x)= 1 and Σx. P

ΣP(x) = 1 and 0 < P(x) ≤ 1

All of these above

The sum of squares of deviations is a minimum if these deviations are taken from the.

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Mean

Mode

Median

All of these

In hyper geometric distribution n is.

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Changed

Zero

Fixed

variable

In case of positively skewed distribution the extreme values lie in the.

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Middle

Left tail

Right tail

Any where

When two coins are tossed simultaneously, P (one head ) is.

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1/2

1/4

3/4

1.0

The sum of squared deviation is minimum, when deviation are taken form

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Mean

Median

Mode

None of these

The probability of drawan any one spade card is.

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1/32

1/18

1/4

4/13

Classification of data according to locations or areas is called.

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Temporal classification

Geographical classification

Qualitative classification

Quantitative classification

When sample space S is partitioned into some mutually exclusive events such that their union is sample space itself. Then the events are called

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Simple events

Compound events

Equally likely events

Exhaustive events

In a fixed base method which period is taken always 100

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Preceding

Following

Base

Current

Title of a table should be in

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Lower case letters

Capital letters

Italic and lower case letters

Twenty letters

Price of commodity in current year can be represented as

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P_oi

P_on

P_n

P_i

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