Suppose a new study has found that people who drink at least 8 cups of water a day have higher energy levels and improved concentration compared to those who do not. The study, conducted over a period of 6 months, involved 100 participants of varying ages and backgrounds, all of whom reported their daily water intake and energy levels.
Can we infer that "Drinking at least 8 cups of water a day has no impact on energy levels."? Yes, no, or maybe?