Mrs. Trahan samples her class by selecting 5 girls and 7 boys. This type of sampling is called?.

Did the universe cool off or get hotter as it expanded after the 'big bang"?

What are the costs and benefits of leaving home after high school?

Which of the following would be considered a nec code violation in regards to the installation of luminaires? a. an outdoor lighting fixture mounted to a tree b. a five-pound, 12-inch diameter light fixture supported by the screw shell of the lampholder c. florescent lay-in fixtures attached to the framing sections of a suspended ceiling with sheet-metal screws d. track lighting over a sink, 2 feet from a bathtub