单选题 An analyst stated that the mean of the standard normal distribution always has a value of zero but that the standard deviation of the standard normal distribution can take on a value from 0 to 1. 0. Is the analyst correct with respect to the value of the standard normal distribution's: mean? Standard deviation? ①A. No No ②B. No Yes ③C. Yes No A．① B．② C．③

【正确答案】 C

【答案解析】The standard normal distribution is a normal distribution that has been "normalized" so that it has a mean of zero and a standard deviation of one.