Sam wanted to know if the color of the chair you sat in when taking a test affected your test grade. For one class, he had students sit in red chairs, and for another he had them sit in blue chairs. What is the independent variable?

Sam wanted to know if the color of the chair you sat in when taking a test affected your test grade. For one class, he had students sit in red chairs, and for another he had them sit in blue chairs. What is the dependent variable?

Robert wanted to know if the type of phone you used gave you better or worse service. He made five phone calls on a Samsung, an iPhone, and a Motorola and compared the reception and call quality. What is the dependent variable?

Sarah wanted to find out if the size of a car tire made it a smoother ride over bumps. She drove her car over the same bumpy road three times, with a different sized tire set each time, and observed how much water splashed out of a cup in her cupholder. What is the independent variable?

Sarah wanted to find out if the size of a car tire made it a smoother ride over bumps. She drove her car over the same bumpy road three times, with a different sized tire set each time, and observed how much water splashed out of a cup in her cupholder. What is the dependent variable?

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

If students spend more time using TikTok, then they will read fewer books. Identify the independent variable.

One group of students read a reading passage in silence and one group of students read the passage with the TV on in the background. They both took a comprehension test to see what they understood from the passage and the results were compared. Identify the dependent variable.

The variable that is changed on purpose in an investigation is called the ...

In an experiment to test the effect of sunlight on plant growth, a scientist uses two groups of plants. One group is exposed to sunlight for 8 hours a day, while the other group is kept in the dark. The scientist measures the height of the plants after two weeks. What is the dependent variable in this experiment?

A researcher is studying the impact of different fertilizers on crop yield. She applies three types of fertilizers to three separate fields and measures the crop yield at the end of the season. What is the independent variable in this study?

In a study to determine if exercise affects sleep quality, participants are divided into two groups. One group exercises for 30 minutes daily, while the other does not exercise at all. Sleep quality is assessed after one month. What is the independent variable in this study?