For Exercises 49–52, identify the independent and dependentvariables for each study.
49.A study was conducted to determine ifcrocodiles raised in captivity (i.e., in a zoo) grew faster thancrocodiles living in the wild. Identify the explanatory variableand the outcome variable.
50.People who walk at least 3 miles a day arerandomly selected, and their blood triglyceride levels are measuredin order to determine if the number of miles that they walk has anyinfluence on these levels.
51.In an article in the British Journal ofNutrition, two types of mice were randomly selected. One groupreceived a thyme supplement for a specific time, while anothergroup was used as a control group and received no supplements. Thebrains of the mice were then analyzed, and it was found that thebrains of the group of mice that received the thyme supplements hadantioxidant levels similar to those of younger mice. It wasconcluded that the thyme supplement increased the antioxidants inthe brains of the mice.
52.A study was conducted to determine ifworkers who had a flexible work schedule had greater jobsatisfaction than those workers who worked a regular nine-to-fivework schedule. Independent variable—type of work schedule.
