The gunman , 26-year-old Harold Kilpatrick jnr , had left a note saying he " wanted to kill some people and die today " .
The gunman , identified as Harold Kilpatrick Jr . , 26 , had left a note saying he " wanted to kill some people and die today . "
determine if the results of a study are due to chance. which test to run depends on the type of data that we are using.