一、正确区别二点分布与二项分布二项分布的特点是某一事件 ,在ｎ次独立重复实验中 ,以事件发生的次数 ξ为随机变量 ;而二点分布是在试验中 ,事件要么发生 ,要么不发生 .两者之间的关系是二点分布是二项分布当ｎ=1时的特殊情形 .例 1　 (课本习题 )某射手射击击中目标的概率为 First, the correct distinction between the two-point distribution and the binomial distribution The two-time distribution is characterized by a certain event. In n independent repeat experiments, the number of occurrences is defined as a random variable; while the two-point distribution is in the experiment, events are either Occurs, or does not occur. The relationship between the two is a special case where the two-point distribution is a binomial distribution when n = 1. Example 1 (textbook exercises) The probability of a shooter hitting a target is