1) A college administrator wants to know whether an orientation workshop will increase success rates for first-time college students. Which of these should he manipulate? a) the number of first-time college students that are admitted b) whether students receive an orientation workshop or not c) the assessments that are used to determine success rate d) when students are required to take placement exams e) all of these 2) A cook thinks that ants find food in her pantry more quickly when the food is high in sugar. Which of these should the cook manipulate? a) the amount of food b) the species of ant c) the location of food d) the amount of sugar e) all of these 3) A grocery-store owner wonders whether the width of the checkout aisles influences how fast the checkout lanes move. Which of these would be the best test of this idea? a) removing cluttered merchandise racks from the checkout aisles b) opening new aisles whenever there are more than three people in line c) encouraging checkout clerks to talk with customers d) posting flyers for sales in the checkout aisles e) all of these
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The Design of Experiments
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