box and whisker diagram

Q7 是 It is found that the longest time taken by the students to finish after the training is 2.9s less than that before.即 after training, 最長時間是 15.2s, 因為 before training, 有 25% 學生跌落 15.3s 至 16.8s 之間, 所以起碼有 25% 學生有 improvement.
Q9 是 The students with shortest result jump 17cm higher than that before.即 after training, 只有之前的學生(們) 跳 1.24m 的改進了. 但沒有話之前跳 高過 1.24m 至 1.41m 的有沒有改進. 嚴格地說, 題目亦沒有說其他學生退歩了.
(你可以說 Q9 在玩文字遊戲. 題目的 1.36 可能是 1.56, 因為沒有可能 1.24 < 1.41 < 1.36)