Question # 1

Sum of the deviations of the variable x from its mean is alwyas....

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Zero

One

Same

Negative

The reciprocal of Arithematic mean of reciprocal of values is called:

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Average

Harmonic mean

Geometric mean

None of these

The number of time a value appears on a set of data is called:

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Frequency

Average

Mode

Median

The mean of the squared deviations of x_i (i = 1, 2, -----------------,n) observations form their arithmetic mean is called:

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Variance

Standard deviation

Range

A value best representing a set of data is called:

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Average

Variance

Standard deriviation

None of these

A histogram is a set of adjacent.........

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Squares

Rectangles

Circles

Dots

The positive square root of mean of the squared deviation of X,{1=1,2,3,.......n) observations from their arithmetic mean is called.

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Harmonic mean

Range

Standard deviation

Variance

The difference between upper limit of two consecutive classes is a frequency table is called:

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Class limit

Class interval

Class mark

All of these

The mean of the squared deviations of X observations from their arithmetic mean is called.

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Variance

Standard deviation

Range

Harmonic mean

Sum of deviations of the variable X from its mean is always_____________

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Zero

One

Same

None

The arrangement of data is necessary to find the value of.

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Mean

Median

Mode

Range

The positive square root of mean of the squared deviations of x_i(i=1, 2---------------------,n) observations from their arithmetic mean is called:

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Harmonic mean

Range

Standard deviation

In class (30-39), lower class limit is....

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39

9

30

34.5

The n^th positive root of the product of the x₁,x₂,x₃..................x_n observations is called:

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Mode

Mean

Geometric mean

The square of standard deriation :

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Standard deriation

Range

Dispersion

Variance

In class (20-29), Midpoint or class mark is...................

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20.5

24.5

29

49

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Mathematics 10th Class English Medium Unit 6 Online Test MCQs With Answers

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