True or false: The "independent variable" in an A/B test is the control or the variation that remains unchanged.

Explanation: **True**. In an A/B test, the "independent variable" is indeed the control or the variation that remains unchanged. The purpose of an A/B test is to compare the performance of two or more variations of a certain element, such as a webpage, email, or advertisement. The independent variable is the one that is manipulated or changed deliberately to observe its effect on the dependent variable, which is the outcome being measured, such as click-through rate, conversion rate, or revenue. In an A/B test, the independent variable typically consists of the variations being tested, while the control remains constant to serve as a baseline for comparison. By isolating the independent variable and holding other factors constant, researchers can assess its impact on the dependent variable more accurately, helping to draw reliable conclusions about which variation performs better. Therefore, it is correct to say that the independent variable in an A/B test is the control or the variation that remains unchanged.