题目

Reading comprehension (阅读理解) True or false (判断下列句子是否符合短文内容，符合的用“T”表示，不符合的用“F”表示): According to Forces magazine, Oprah Winfrey is one of the richest women in America. She has worked as a news reporter, movie actress, and writer, but she is best known for her popular television talk show, Oprah. Life has not always been easy for Oprah. When she was young, her parents did not live together and she often moved house. Her family was poor, and Oprah did not have her first pair of shoes until she was six years old. But O一种化学名为“尼美舒利”的儿童退热药，其药品安全性疑虑引起社会的关注，国家药监局调查了这种药的100个相关数据，绘制成如图所示的频率分布直方图，再对落在[6，11），[21，26）两组内的数据按分层抽样方法抽取8个数据，然后再从这8个数据中抽取2个，（1）求最后所得这两个数据分别来自两组的概率？（2）由所给的频率分布直方图估计样本数据的中位数？（精确到0.01）