Adjusted R2 gives the actual percentage of the variation in the dependent variable explained by the regression model

For the polynomial regression model,

A) you need new estimation techniques since the OLS assumptions do not apply any longer. B) the techniques for estimation and inference developed for multiple regression can be applied. C) you can still use OLS estimation techniques, but the t-statistics do not have an asymptotic normal distribution. D) the critical values from the normal distribution have to be changed to 1.962, 1.963, etc.

The primary source of earnings of commercial banks is income derived from

a. the checking account services provided to customers. b. the use of deposits to extend loans and undertake investments. c. vault cash and deposits held with the Fed. d. services provided to the U.S. Treasury.