标题: practice exam 1 T29 [打印本页] 作者: fionaqian 时间: 2010-5-31 14:58 标题: practice exam 1 T29
why the answer is A????? anybody can help me??thank you so much!!!
which of the statement about the normal distribution is wrong? A. has a mean of 0 and standard deviation of 1. (why this is wrong?) B. is completed described by the mean and the standard deviation C. is bell-shaped, with tails extending without limit to the left and to the right