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Question 5 (1 point) The owner of a golf course wants to determine if his golf course is more difficult than the one his friend owns. He has 9 golfers play a round of 18 holes on his golf course and records their scores. Later that week, he has the same 9 golfers play a round of golf on his friend's course and records their scores again. The average difference in the scores (treated as the scores on his course - the scores on his friend's course) is 9.98 and the standard deviation of the differences is 13.5637. Calculate a 90% confidence interval to estimate the average difference in scores between the two courses. 1) (8.1205, 11.8395) O 2) (-1.5725, 18.3875) ( 3) (1.5725, 18.3875) ( 4) (1.6921, 18.2679) ( 5) (5.4588, 14.5012)