5 A professor is interested in finding out if providing a different kind form of study guide before exams will help her students do better on the exams. Which of the following is true? A) The research hypothesis would be non-directional B) The null hypothesis would definitely be true C) The research hypothesis would be one-tailed D) The research hypothesis would be two-tailed Q.6 A researcher is interested in a new kind of treat for dogs. This new treat is good for dental hygiene and is low cost and easily accessible. The researcher is interested in whether this new treat will help dogs maintain better dental hygiene than previous dental hygiene treats for dogs. What is the comparison distribution? A) The distribution of dental hygiene scores for dogs who do not eat the new treat B) The distribution of dental hygiene scores for dogs who do not like to eat any treats at all C) The distribution of dental hygiene scores for dogs who eat the new treat D) The distribution of dental hygiene scores for dogs who have better dental hygiene because of the new treats