Suppose a new study has found that people who drink at least 8 glasses of water a day are more likely to have clearer skin. The study involved 100 participants who were divided into two groups: one group drank at least 8 glasses of water a day, while the other did not. After a month, researchers found that the first group had 30% fewer breakouts than the second group.
Can we infer that "Drinking at least 8 glasses of water a day can improve skin health"? Yes, no, or maybe?