Researchers interviewed participants to find some who reliably fell asleep and awoke on one side and who could remember their dreams. They found 63 participants, of whom 41 were right-side sleepers and 22 slept on their left side. Then they interviewed them about their dreams. Of the 41 right-side sleepers, only 6 reported often having nightmares. But of the 22 left-side sleepers 9 reported nightmares. Is the difference significant?