Question # 1

Which of the following average is effected by extreme values.

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Median

Mode

Arithmetic mean

All of these

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

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Median

Mean

Weighted mean

Harmonic mean

Which of the following statements is true.

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As a rule statisticians genereally use between 6 and 15 classes.

As a rule, statisticians regards a frequency distribution incomplete if it has fewer than 20 classes.

Classes describe only one characteristics the data ebign organized

None of these

Which is the suitable average for calculting average percent increase in population.

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Median

Geometric mean

Mean

Harmonic mean

If any value in a sereis is zero, then we cannot calculate the.

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Mean

Median

Mode

Harmonic mean

A fair coin is tossed four times the probability of getting four heads is

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1/4

1/2

4/6

1

In which of these cases would the mode be most useful as an indicator of central tendency.

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Every value in a data set occurs exactly once

All but three values in a data set occur once, three valeus occur 5 times each

All values in a data set occur 10 times each

Every observation in a data set has the same value.

Statistics must be

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Comparable

Not comparable

Qualitative only

NOne of these

Quartile Co-efficient of skewness is also called as

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Median co-efficent of skewness

Pearson's 1st co-efficient of skewness

Pearson's 2nd co-efficient of skewness

None of these

The hypergeometric distribution has -------------- parameters

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One

Two

Three

Four

Hourly temperature recorded by weather brave is the example of:

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Discrete variable

Continuous variable

Qualitative

Both A and B

Tabulation means, the process of arranging the date into.

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Different classes

Rows

Columns

Rows & columns

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

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E (y)

[E(y)]²

E(y²)

None of these

The positive square root of the mean of the squares of deviations of values from their mean is

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Variance

Covariance

Standard deviation

Standard error

^AP₃is equal to.

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3!

4!

5!

6!

Which of the following case is true for hypergeometric distribution.

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Probability remains constant for all trials

Probability changes

successive trials are dependent

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

The lack of symmetry is called________.

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consistent

skewness

Equidistant

Kurtosis

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

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