Rhea Singh conducted an experiment to test how different amounts of water affect yeast growth. The hypothesis was that more water would lead to more yeast growth, but the results showed the opposite. Yeast grew most with 50mL of water and least with 200mL. While the data was generally consistent on repeat trials, some adjustments were made to improve reliability, such as increasing the measurement time from 5 to 15 minutes and standardizing the water temperature. Overall, the experiment demonstrated that less water allows for greater yeast growth.