Proble m Se t 9. The scores below are the number of clinical hours (CHs) that Master's level graduate students in clinical practicum have accumulated in a week. The standard deviation was calculated to be = 4.8 Scores: 13, 11, 4, 15, 21, 16, 16, 5, 17, 15, 13 34. See Problem Set 9. Using the percentile rank formula, Formula 1 on page 2 of Week 3 book content, calculate the percentile rank that corresponds to a score of 13 CHs. Round to the nearest tenths place if a fraction. The percentile rank is: a. 45.5 b. 63.5 c. 72.1 d. 40.1 e. the correct percentile rank is a value not listed in alternatives "a" through "d"