A farmer investigates whether talking to cows by name leads to producing more milk. He randomly talks to 48 of his cows by name, and the other 50 he does not talk to by name. On his spreadsheet, the farmer records "yes" if the cow produced more milk or "no" if the cow did not. He found that 15 cows who were talked to by name produced more milk. There was a total of 27 cows that produced more milk. 5. State the explanatory variable and its type. (1 pts)