1.3 Frequency, Frequency Tables, and Levels of Measurement 80. Fifty part-time students were asked how many courses they were taking this term. The (incomplete) results are shown below: # of Courses Frequency Relative Frequency Cumulative Relative Frequency 1 30 0.6 15 3 Table 1.33 Part-time Student Course Loads a. Fill in the blanks in Table 1.33. b. What percent of students take exactly two courses? c. What percent of students take one or two courses? 81. Sixty adults with gum disease were asked the number of times per week they used to floss before their diagnosis. The (incomplete) results are shown in Table 1.34. # Flossing per Week Frequency Relative Frequency Cumulative Relative Freq. 0 27 0.4500 1 18 3 0.9333 6 3 0.0500 7 0.0167 Table 1.34 Flossing Frequency for Adults with Gum Disease a. Fill in the blanks in Table 1.34. b. What percent of adults flossed six times per week? c. What percent flossed at most three times per week