11.2. Statistics

The numbers generated by random are frequently distributed uniformly. That means that each value in the range should be equally likely. If we count the number of times each value appears, it should be roughly the same for all values, provided that we generate a large number of values.

In the next few sections, we will write programs that generate a sequence of random numbers and check whether this property holds true.

Although the uniform int distribution is both common and often desired, the C++ random library defines several other distributions useful in science and engineering, including:

• bernoulli distribution

• binomial distribution

• poisson distribution

• normal distribution

and others that are part of these broad families of distributions.

The convenience and ease of use of these and other functions in the C++ random library is one of many excellent reasons to use them instead of the rand() family of functions they replace from the C library.

Q-1: Random numbers are frequently distributed __________.

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