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Read the following research questions and identify independent variable(s) and dependent variable(s) with scales. Also, suggest the appropriate statistical methods for each scenario.
Is there a difference in the time spent online per week for people who are single, people who are married without kids, and people who are married with kids?
Is there a difference between the weights of Americans and Canadians within the age ranges 20–40, 40–60, and above 60?
Is there a difference in the target selection speed between the mouse and the joystick for children who are 5–9 years old? (Each child uses both the mouse and the joystick during the study.)
Use the distance between the current cursor location and the target location to predict the amount of time needed to select a target.
Is there a difference between users in the United States and users in the United Kingdom when using three search engines? (Each user should use all three engines during the study.)
Do students in the English department have a higher GPA than students in the Education department?
Is there a relationship between the sales of Cheerios and the sales of milk in a grocery store?
Is there a difference between the blood pressures of people over 60 in the morning, at noon, and in the evening? (Each participant contributes three data points, each from a different time of the day.)
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