Shaniqua was interested in finding out how people would sleep after being told that the house they were in was haunted. She randomly selected 28 people from her school to participate in the study. She randomly assigned 14 of the people to sleep in the house on Friday night, when she told them all that it was haunted. The other 14 slept in the house on Saturday night and were not told that the house was haunted. She then measured how long each person slept and found that those in the "haunted" group got fewer hours of sleep than those in the "not- haunted" group. The independent variable is -Whether or not they were told that the house was haunted.
-The amount of sleep they got.
-The class that they were chosen from. -The night they slept at the house.​