For instance, if you take an average of a 0,1 variable, the result is the proportion of 1s in the distribution. To illustrate dummy variables, consider the simple regression model for a posttest-only two-group randomized experiment.
President Barack Obama has already played nearly eight times as many rounds of golf during his presidency as President George W. Bush did throughout his eight years in office, according to noted presidential chronicler of all things numerical, CBS Newsâ Mark Knoller.
He's a leisurely player, spending four to five hours at the golf course most outings. He's definitely not a speed golfer like President George H. W. Bush, who was known to play 18 holes in as little as 90-minutes.