Jose conducts a study to test the effectiveness of three brands of detergent: Tide, Seventh Generation, and Gain. The dependent variable is number of stains left on clothes after one wash. What is the research/alternative hypothesis?

Group of answer choices

All three brands will show significantly different number of stains.

There will be no difference in number of stains across the three brands.

Tide shows fewer stains than Seventh Generation which shows fewer than Gain.

At least one brand differs from the other three in number of stains.