Dr. Hogan was interested in the effects of test anxiety on concentration abilities. He measured student anxiety levels using an anxiety questionnaire when the students first arrived at his laboratory and then again immediately before taking an examination. Dr. Hogan hypothesized that participants in his study would have higher anxiety scores right before taking the exam compared to when they first came into the lab. As hypothesized, Dr. Hogan found that participants' anxiety scores were significantly higher immediately prior to the examination compared to baseline scores. a. As a result of this information, what type of t test was Dr. Hogan MOST likely to use to test his hypothesis? Why did you reach this conclusion? b. Is Dr. Hogan's hypothesis test one-tailed or two-tailed? Explain your