Age 11 to 14 Challenge Level:
A term used in probability, relating to things that happen by
chance. It means that there is no special pattern to the items or
numbers that are selected or chosen, that is, they happen in a
Some process that is carried out according to a set of rules. The
rules determine completely the process that we carry out, but they
do not tell us in advance what the outcome of the experiment will
be. A random experiment can be repeated arbitrarily often.
A sequence of randomly generated numbers, where all the numbers had
an equal chance of being picked, every time. Tables of random
numbers used to be printed in books, these days they're usually
simulated on computers/calculators. They are used to select random
samples in statistics.