Traditional Culture Encyclopedia - Photography and portraiture - Yanzi photography

Yanzi photography

The sum of all values of p is 1.

Then do this p {x =1}+p {x = 2}+... p {x = n} =1.

But through the condition p {x =1}+p {x = 2}+... p {x = n} = a/n * n = a.

So a= 1

For the discrete random variable X, the probability of its value being k is pk. The distribution law reflects the whole picture of the probability distribution of discrete random variables.

Extended data:

The law of discrete distribution is a table listing the values corresponding to the values when the probability is greater than 0 and the sum of probabilities = 1. The binomial distribution 0- 1 distribution (special binomial distribution) and the distribution law of Poisson distribution also mean this.

Distribution is different from probability. Distribution represents an average value, such as all three statistics. Using the average value of Darwin-Fowler method, Maxwell-Boltzmann distribution is obtained as an accurate result.