题目

A pretty, well-dressed young lady stopped a taxi in a big square, and said to the driver, “Can you see that young man at the other side of the square?” “Yes,” said the taxi-driver. The young man was standing outside a restaurant and looking impatiently at his watch every few seconds. “Take me over there.” said the young lady. There were a lot of cars and buses and trucks in the square, so the taxi- driver asked, “Are you afraid to cross the street.” ‘Oh, no !” said the young lady. “But I said that I would meet that young man for dinner at one o’c1ock, and it is no现有同一型号的电脑96台，为了了解这种电脑每开机一次所产生的辐射的情况，从中抽10台在同一条件下作开机试验，测量开机一次所产生的辐射． (1)采用简单随机抽样法抽取上述样本． (2)根据所得样本，对总体平均数与总体标准差作出估计．