the IB SL formula booklet Round to 3 s f if not otherwise specified Viding all work You may use a graphing calculator and 5 In a school 200 students solved a problem in a mathematics competition Their times to solve the problem were recorded and the following cumulative frequency graph was produced a cumulative frequency a i a ii 225 200 175 b 150 125 100 75 50 25 0 0 10 Use the graph to find the median time 200 2 the lower quartile 200 100 38 9 a lii the upper quartile 50 32 20 a iv the interquartile range 50x3 150 43 30 time seconds Q3 Q1 43 32 11 Cedric took 14 seconds to solve the problem Q3 1 5x IQR Determine whether Cedric s time is an outlier SHOW ALL WORK Upper bound i 40 555 50 60 Lower bound S QI 5xIan