Question # 1

The spread or scatierness of observations in a data set is called.

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Average

Dispersion

Central tendency

Quartile

Formula l=rθ is true only when θ is in:

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degree

radian

revolution

minute

The formula of area of circular sector is:

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l = rθ

r²θ

1/2r²θ

2r²θ

If θ lies in 2nd (second) quadrant then sin θ and cosecθ are:

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negative

positive

zero

undefined

In the given set of data 5,7,7,5,3,7,2,8,2 mode is:

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9

5

2

7

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

The spread of observations in a data set is called.

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Average

Dispersion

Central tendency

Mean

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

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39

9

30

34.5

Sum of the deviations of the variable "X" from its mean is always:

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Zero

One

Same

Mean of a variable with similar observations say constant k is............

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Negative

K- itself

zero

one

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

A grouped frequency table is also called.............

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Data

Frequency distribution

Frequency polygon

Histogram

A frequency polygon is a many sided:

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Closed figure

Rectangle

Square

Types of dispersion are.........................

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4

5

6

8

The size of class interval (6-10) is.

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4

5

8

10

If tan θ = √3 then θ =____________.

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30°

45°

60°

90°

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

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