问题
单项选择题
The standard normal distribution is most completely described as a:（）
A. symmetrical distribution with a mean equal to its median.
B. normal distribution with a mean of zero and a standard deviation of one.
C. distribution that exhibits zero skewness and no excess kurtosis.
答案
参考答案：B
解析：
The standard normal distribution is defined as a normal distribution that has a mean of zero and a standard deviation of one. The other choices apply to any normal distribution