With respect to generation of random or pseudo-random numbers, a process is biased if the occurrence of some numbers and/or patterns is more likely than others [x917-85][x919]
If someone is biased, they prefer one group of people to another, and behave unfairly as a result. You can also say that a process or system is biased. He seemed a bit biased against women in my opinion The judge was biased. = prejudiced
If something is biased towards one thing, it is more concerned with it than with other things. University funding was tremendously biased towards scientists