Question # 1

The formula of grouped data of the arithmetic mean is:

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X̅ = ∑X/n

X̅ = A + ∑fX/∑X

X̅ = ∑fX/n

X̅ = l +n/f (n/2 - c)

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

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negative

positive

zero

undefined

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 observation that divide a data set into four equal parts are called.

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Declies

Quartiles

Percentiles

Harmonic mean

The measure of a central angle of minor arc of a circle is _______ that of the angle substends by corresponding major arc:

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Half

Equal

Double

Triple

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1/cosθ = ................

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Sinθ

Secθ

Co secθ

Cosθ

A straight line which cuts the circumference of a circle in two distinct points is called:

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chord

secant

tangent

sector

If y = kx, x = 7 and y = 6, then k =

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42

13

Point (-1,4) , lies in the quadrant.

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I

II

III

IV

An ______________ is defined as the union of two non-col-linear rays with some common end point:

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angle

vertex

initial side

terminal

A deviation is defined as a difference of any value of the variable from a.

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Constant

Historgram

Sum

Product

A tangent line intersects the circle at:

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Three points

Twopoints

Single point

No point at all

A tangent is perpendicular to the radius of a circle at its point of:

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Tangent

Touch

Contact

Meet

The mode in the data 1,3,5,3,7,9

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1

3

5

7

(x+3)² = x² + 6x + 9 is:

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A linear equation

An equation

An identity

None of these

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