Question # 1

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

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Opposite

Estimated

Estimates

Random

If r = -1, then there is

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negative correlation

perfect negative correlation

no correlation

average correlation

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

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arithmetic mean

geometric mean

harmonic mean

median

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)

The variable that forms the basis of estimation is called

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regression

regressand

regressor

correlation

If b_yx = 0.89 and b_xy = 0.75, then r=

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0.89

0.28

0.98

0.82

Regression line x on y is

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If the value of any regression coefficient is zero, then two variable are _______.

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Qualitative

Correlation

Dependent

Independent

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S_xy

S_yx

b_xy

b_yx

When b_xy is positive, then b_yx will be _______.

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Negative

Positive

Zero

One

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

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=

<

>

≠

The measures of strength of closeness of linear relationship between two variables is called

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simple linear regression

composite linear regression

simple linear correlation

composite linear correlation

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