Probability Theory for Landing Page Testing    |  February 28,
2011   |  Comments  A tutorial on what probability theory is,
the two kinds of processes, and how it all applies to landing
page testing.  Probability theory is a branch of mathematics
that deals with the description and analysis of random events.
The key building blocks of this framework are as follows:    • A
random variable is a quantity whose value is random or
unpredictable, and to which we can assign a probability
distribution function.   • The probability distribution function
determines the set of possible values that can be assigned to
the random variable, along with their likelihood. The total of
all possible outcomes' likelihood must by definition equal one
(i.e., one of the possible outcomes must happen, and its value
will be assigned to the random variable).  Let's use a fair
gaming die as an example. The top face of the die can take on
one of six possible outcomes (i.e., one, two, three, four, five,
six). The probability distribution