Random Variable Definition
If S is the sample space of a random experiment and to each si belongs to S there corresponds unique real number X(si), then the real valued function s thus defined is called a random variable defined on S.
Values of a Random Variable
Suppose R is range of a random variable X and R = {x1, x2,…..,xn}then (x1, x2,…..,xn) are called values of the random variable X.
Frequency of a Random Variable
Suppose X is a random variable defined on a sample space S. If x1, x2,…..,xn are values of S and if fi simple events are corresponding to the same value Xi of X for i=1 to n, then f1, f2,……,fn are called frequencies of x1, x2,…..,xn respectively.
Note :-
S is a sample space of a random experiment. N is the number of simple events on S. x1, x2,…..,xn are values of X and f1, f2,……,fn are corresponding frequencies then
