Mark is practicing his tennis serves. He wants to be able to tell newspaper reporters the long-run proportion of getting his fi rst serve in. Mark gets 17 of his first 20 serves in.
a. Is 17 out of 20 = 85% a statistic or a parameter?
b. Is the long-run proportion of Mark’s first serve being in a statistic or a parameter?
c. Do you think that 17 out of 20 serves in is a possible outcome if Mark is just as likely to get his first serve in as to not get his first serve in?
d. Do you think that 17 out of 20 serves in is a plausible outcome if Mark is just as likely to get his first serve in as not to get his first serve in?