题目

An idea that started in Seattle's public library has spread throughout America and beyond. The concept is simple: help to build a sense of community in a city by getting everyone to read the same book at the same tome. In addition to encouraging reading as a pursuit (追求) to be enjoyed by all, the program allows strangers to communicate by discussing the book on the bus, as well as promoting reading as an experience to be shared in families and schools. The idea came from Seattle librarian Nancy Pearl who launched (发起）the If All of Seattle Read the Same Book project in 1998. （本小题满分12分）为了比较注射A,B两种药物后产生的皮肤疱疹的面积，选200只家兔做实验，将这200只家兔随机地分成两组。每组100只，其中一组注射药物A，另一组注射药物B。下表1和表2分别是注射药物A和药物B后的实验结果。（疱疹面积单位：）完成下面频率分布直方图，并比较注射两种药物后疱疹面积的中位数大小；