70 58 60 50 42 40 40 31 Frequency 30 20 13 8 10 2 3 2 0 60 70 80 90 100 110 120 130 140 150 160 IQ Scores (a) How many students were sampled? (b) Determine the class width. (c) Identify the classes and their frequencies. Which class has the highest frequency? (e) Which class has the lowest frequency? (f) What percent of students had an IQ of at least 130? g) Did any students have an IQ of 165