Spending time with a family dog decreases the amount of stress someone is feeling. What is the dependent variable?

Eating breakfast in the morning increases the ability to learn in school. Identify the independent variable.

Students watched a cartoon either alone or with others, then rated how funny they found the cartoon to be on a scale of 1-10. Identify the independent variable.

Workers at a company were assigned to one of two conditions: One group completed a stress management training system; another group of workers did not participate in the training. The number of sick days taken by these workers was counted and studied for the next 2 months. Identify the dependent variable.

Students at a local college were split into two groups and each received a different textbook for a course. Once group received a traditional textbook while the other recieved an interactive textbook on a tablet computer. After the course, the final exam grades between the two groups of students were compared. Identify the independent variable.

Vitamin could extend a person's life expectancy. The dependent variable is __________.

"Do tomatoes grow faster under fluorescent, incandescent, or natural light?"

What is the independent variable?

"Which brand of bubblegum will have the biggest bubble?"

The size of the bubble is the __________ variable.

Say you want to know whether caffeine affects your appetite. The presence/absence of a given amount of caffeine would be the __________ variable. How hungry you are would be the __________ variable.

Jon set up an experiment to see how the mass of a ball affects the distance it rolls off a ramp. Identify the independent variable.

Which sentence describes the relationship shown on this scatter plot?

Which scatter plot show a positive relationship?

Label the type of association shown by the scatter plot as positive, negative or none.