Question # 1

If X and Y are independent, then Cov(x,y) = 0 which implies that

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b_yx = 0

b_xy = 0

ρ = 0

a = 0

r is the ------------ of two regression co-efficient b_yx and b_xy

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arithmetic mean

geometric mean

harmonic mean

median

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b_yx

b_xy

S_p

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37

132

32

cannot be calculated

The variable, whose resulting value depends upon the selected value of the independent variable is called______.

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Regression

Regressor

Regressand

Coefficient

The estimated regression line always passes through

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origin

x-axis

y-axis

The variable that forms the basis of estimation is called

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regression

regressand

regressor

correlation

A data points falling along a straight line is called______.

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Linear relationship

Non-linear relationship

Linear positive

Scatter diagram

The relationship that describes the dependence of the expected value of the dependent random variable for a given value of the independent non-random variable is called

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equation

relation

ratio

regression

r_xy -------------- r_yx

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=

<

>

≠

Regression line x on y is

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The value of the coefficient of correlation relies between__________.

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-1 and +1

0 and 1

-1 and 0

-0.5 and + 0.5

The regression equation always passes throught_________.

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(X, Y)

(X, y̅)

(X̅, Y)

(X̅, y̅)

When b_xy is positive, then b_yx will be _______.

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Negative

Positive

Zero

One

In simple linear regression, the number of unknown constants are:

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Two

Three

Four

Five

The estimates of the parameters=α and=β are

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μ and=σ2

a and b

μ andπ

χ2 and Z

The _______ regression line always passes through (X̅, y̅).

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Opposite

Estimated

Estimates

Random

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ICS Part 2 Statistics Chapter 14 Online Test MCQs With Answers

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