1. Suppose we are using a random number generator to randomly select 3 firefighters from a list of 20 to attend a training course. Which of the following statements is true?

a. If we used another list of random digits to select the 3 firefighters, we would get the same results as obtained with the list actually used.

b. If we used another list of random digits to select the 3 firefighters, we would get 3 completely different firefighters than those obtained with the list actually used.

c. If we used another list of random digits to select the 3 firefighters, we would get at most one in common with those obtained with the list actually used.

d. If we used another list of random digits to select the 3 firefighters, the firefighters obtained with the list actually used would be just as likely to be selected as any other set of 3 firefighters.

2. A study of the effects of running on personality involved 231 male runners who each ran about 20 miles a week. The runners were given the Cattell Sixteen Personality Factors Questionnaire-a187-item multiple choice test often used by psychologists. A news report stated, "The researchers found statistically significant personality differences between the runners and the 30-year-old male population as a whole." A headline on the article said, "Research has shown that running can alter one's moods." Which of the following statements is true?

a. This study was not a designed experiment.

b. This study was an experiment, but not a double blind experiment.

c. This study was a double blind experiment, but not a randomized experiment.

d. This study was a randomized, double blind experiment.