请根据“绿叶在光下制造有机物”的①﹣⑥实验步骤示意图，回答下列问题

①把盆栽的天竺葵放在黑暗处一昼夜；

②用黑纸把一片叶的部分从正面和背面遮住，然后移到阳光下照射3至4小时；

③剪下遮光的叶片，去掉黑纸

④将叶片放在盛有酒精的小烧杯中，再放入大烧杯内隔水加热一段时间

⑤取出叶片，用清水漂洗干净，然后放在培养皿里，向叶片滴加碘液；

⑥稍停片刻，用清水冲洗掉碘液．实验结果与分析：

In order to safeguard（保证）the education of all Hope Chinese Scholl（HCS）students and the normal running of the school, the following rules should be followed:
★ Be quiet in classroom and hallways. Do not run or shout in classrooms or hallways.
★ Do not drink or eat in classrooms or hallways.
★ Stay in the school during school time as well as rest time. Do not leave the school or play out of the school area during school time. This includes rest time.
★ Do not scribble on any desks or walls.
★ Be respectful（尊敬）to teachers and parents.
★ Help teachers and other students to keep the classroom clean. Do not move desks, chairs, and other furniture in the classroom without the teacher's instructions.

某校九年级8位同学一分钟跳绳的次数排序后如下：150，164，168，168，172，176，183，185．则由这组数据得到的结论中错误的是（　　）