# Are truncated numbers from a random number generator still 'random'?

Here 'truncating' implies reducing precision of the random numbers and not truncating the series of random numbers. For example, if I have $n$ truly random numbers (drawn from any distribution, e.g., normal, uniform, etc.) with arbitrary precision and I truncate all the numbers so that finally I end up with a set of $n$ numbers, each with exactly 2 digits after the decimal. Can I call this new set of numbers 'random'?

I came up with this question when I was reading about hardware generated random numbers. The Wikipedia article says they generate random numbers by measuring a physical process. But since this measurement has its limitations (measurement error, finite precision, etc) can we call these hardware generated numbers random?

There are senses in which the change to the distribution is large, e.g., the $L_1$ distance between any continuous distribution and any discrete distribution is maximal. The average of some discontinuous functions of the value may change a lot.
• This answer is wrong. Unfortunately @steadyfish has asked for "any distribution". Let $X$ be the result of rolling a die. Then append 1.00 to the front of $X$, so that the sample space is 1.001, 1.002, 1.003, and so on. Truncating to two digits would leave you with a degenerate random variable. Aug 28, 2014 at 17:44