A survey can collect information using which of the following ...

[craiczarry]

A survey can collect information using which of the following techniques?
 a. telephone
  b. face-to-face interviews
  c. mail
  d. all of these choices

Question 2

If additional independent (X) variables are added into the regression equation, r2 will always get larger. To correct for this situation, statisticians have developed the _______________, which is not so easily influenced by additional variables.
 a. least sum-of-squares c. standard error
  b. r2-adjusted d. coefficient of determination

[Brenm]

Answer to Question 1

D

Answer to Question 2

B
r2-adjusted was developed to prevent r2 from automatically increasing by just adding additional X variables.