chapter 12 Flashcards
Define random
if individual outcomes are uncertain but there is nonetheless a regular pattern or distribution of outcomes in a large number of repetitions
Define probability
ny outcome of a random phenomenon is the proportion of times the outcome would occur in a very long series of repetitions
What is a sample space
is the set of all possible outcomes
Define an event
an outcome or a set of outcomes of a random phenomenon. That is, an event is a subset of the sample space
What is a probability model
a mathematical description of a random phenomenon consisting of two parts: a sample space S and a way of assigning probabilities to events
Define finite
fixed and limited number of outcomes
What is a continuous probability model
assigns probabilities as areas under a density curve. The area under the curve and between any range of values is the probability of an outcome in that range
What is a uniform distribution
a continuous probability distribution that assigns equal probability to every number (or to every interval of a given length) in the range of values over which it is defined
Define random variable
a variable whose value is a numerical outcome of a random phenomenon
What is a probability distribution
a random variable x tells us what values
x can take and how to assign probabilities to those values
Define personal probability
s a number between 0 and 1 that expresses an individual’s judgment of how likely the outcome is
