probability mass function和probability distribution有何异同?

probability mass function和probability distribution有何异同? 请问probability mass function是什么意思?怎么计算的? probability mass 有了X的概率密度函数,怎么求Y的?现给了X的概率密度函数:P(x=k)=0.15,k=1,2,3,4P(x=k)=0.1,k=5,6,7,8P(x=k)=0,其他并给出:Y=10.5X-0.5X^2该怎么求Y的概率密度函数?写错了，应该是概率质量函数(Probability Mass Fun probability是什么意思? probability是什么意思? outage probability write a programe to generate n values from the probability mass function p1=1/3 p2=2/3n=100,1000,10000 and determine the proportion of values that are equal to 1应该怎么编程? fun fun MASS 或 Mass spectroscopy mass-market mass nouns THE MASS the mass mass balance