1. In a hypothetical experiment, scientists tested to see if people could tell the difference between a shaken and a stirred martini. They gave 16 people a taste test. Each subject received a shaken and a stirred martini. They were then observed to see if they could tell which was which. Identify all variables, and identify what their categories are. Use the following for questions 28. To detect the presence of harmful insects in farm fields, we can put up boards covered with a sticky material and examine the insects trapped on the boards. Which colors attract insects the best? Experimenters placed six boards of each of four colors at random locations in a field of oats and measured the number of cereal leaf beetles trapped. The exact same thing was done at two other fields of oats. The three fields were at different elevations: 1000 feet, 2000 feet, and 6,000 feet. VARMBLE # OF CATEGORIES CATEGORIES SCALE