# Correlation and Regression 2

This Section contains Multiple Choice Questions (MCQs) about Correlation Analysis, Simple Regression Analysis, Multiple Regression Analysis, Coefficient of Determination (Explained Variation), Unexplained Variation, Model Selection Criteria, Model Assumptions, Interpretation of results, Intercept, Slope, Partial Correlation, Significance tests, OLS Assumptions etc

Question 1:Coefficient of Correlation values lies between

A) -1 and +1
B) 0 and 1
C) -1 and 0
D) None of these

Question 2: If $r_{xy} = -0.84$ then $r_{yx}=?$

A) -0.84
B) 0.84
C) 0.42
D) None of these

Question 3: In Correlation both variables are always

A) Random
B) Non Random
C) Same
D) None

Question 4: If two variables oppose each other then the correlation will be

A) Positive Correlation
B) Zero Correlation
C) Perfect Correlation
D) Negative Correlation

Question 5: A perfect negative correlation is signified by

A) 0
B) 1
C) 0.5
D) -1

Question 6: The Coefficient of Correlation between $U=X$ and $V=-X$ is

A) +1
B) -1
C) 0
D) 0.5

Question 7: The Coefficient of Correlation between X and X is

A) -1 to +1
B) 0
C) -1
D) 1

Question 8: The Coefficient of Correlation r is independent of

A) Origin only
B) Scale of Measurement only
C) Both change of origin and scale of measurement
D) None of these

Question 9: If X and Y are independent to each other, the Coefficient of Correlation is

A) -1
B) 0
C) +1
D) None

Question 10: If $b_{yx} <0$ and $b_{xy} =<0$, then r is

A) =0
B) <0
C) >0
D: $neq 0$

Question 11: If $r=0.6, b_{yx}=1.2$ then $b_{xy}=?$

A) 0.3
B) 0.2
C) 0.72
D) 0.40

Question 12: When regression line passes through the origin then

A) Regression coefficient is zero
B) Correlation is zero
C) Intercept is zero
D) Association is zero

Question 13: Two regression lines are parallel to each other if their slope is

A) Different
B) Same
C) Negative
D) None of these

Question 14: When $b_{xy}$ is positive, then $b_{yx}$ will be

A) Positive
B) Negative
C) Zero
D) One

Question 15: If $\hat{Y}=a$ then $r_{xy}$?

A) $b_{xy}=1$
B) $b_{yx}=-1$
C) $b_{yx}=0$
D) None of these