Questions and CORRECT Answers
Could a variable, say price, be either a dependent or an independent variable? - CORRECT
ANSWER - TRUE
A variable that takes binary values (pass/fail or true/false) cannot be a dependent
variable. - CORRECT ANSWER - FALSE. We do use 0/1 dependent variables in logistic
regression models;
The mean of a variable that has a right-skewed distribution is smaller than
the median. - CORRECT ANSWER - False
The correlation coefficient can capture the strength of both linear and non- linear relationships. -
CORRECT ANSWER - FALSE
The total deviation at observation (xi , yi ) is 𝒚𝒊 − 𝒚ഥ. - CORRECT ANSWER - True
In OLS, the estimates of slope and intercept do not depend on the sample
being used. - CORRECT ANSWER - False
R2(square) = 0, implies that X values account for all of the variation in the Y values -
CORRECT ANSWER - FALSE. R2(square)= 0 implies that X values account for none of
the variation in the Y values
R2(square)can take any value from - infinity to + infinity - CORRECT ANSWER -
FALSE. It can take on values between 0 and 1
In general, adding more variables decreases the overall R-Square value of the multiple regression
- CORRECT ANSWER - False