Unit 2: Chapter 4-6 Flashcards
(17 cards)
correlation
causation
a numeric quantity that measures the STRENGTH and DIRECTION of the linear relation between two quantitative variables. Notatated r
sample space
the set of ALL possible outcomes of a statistical experiment. Denoted S
event
a collection of one or more outcomes of a statistical experiment. (must come from sample space)
unusual event
an event that has a lower probability of occurring. it is unusual if it had a probability LESS than 0.05 or 5%
probability model
lists the possible outcomes a probability experiment and each outcome’s probability
complement
is all outcomes in S that are NOT outcomes in E
independent variables
two events E and F are independent if the occurrence of event E does not affect the probability of event F
dependent variables
two events E and F are dependent if the occurrence of event E affects the probability of event F
random variable
is a NUMERIC measure of the outcomes of a probability experiment
discrete random variable
the variable can only be a FINITE number of values or a COUNTABLE number of values
continuous random variable
the variable has UNCOUNTABLY many values
probability distribution
of a discrete random variable X provides the possible values of the random variable and their corresponding PROBABILITY
binomial probability distribution
disjoint events
two events are disjoint if they have NO OUTCOMES IN COMMON. also known as mutually exclusive
combination
an UNORDERED arrangement of objects in which r objects are chosen from n distinct (different) objects so that r _< n and REPETITION IS NOT ALLOWED
notation nCr
permutation
an ORDERED arrangement of objects in which r objects are chosen from n distinct (different) objects so that r _< n and REPETITION IS NOT ALLOWED
notation nPr
