Sections:
5-2 Random Variables; Probability distribution

Introduction
So far we have done
descriptive statistics (e.g., summarizing data,
measures of center, variation and relative standing)
and notions of
Probability
. We will combine these ideas to study the
Probability
distribution
.

Introduction
So far we have done
descriptive statistics (e.g., summarizing data,
measures of center, variation and relative standing)
and notions of
Probability
. We will combine these ideas to study the
Probability
distribution
.
Recall that in the
relative frequency distribution
, we associated a
relative frequency
to each
class
, from the
sample data
.

Introduction
So far we have done
descriptive statistics (e.g., summarizing data,
measures of center, variation and relative standing)
and notions of
Probability
. We will combine these ideas to study the
Probability
distribution
.
Recall that in the
relative frequency distribution
, we associated a
relative frequency
to each
class
, from the
sample data
. In a
probability distribution
,

Introduction
So far we have done
descriptive statistics (e.g., summarizing data,
measures of center, variation and relative standing)
and notions of
Probability
. We will combine these ideas to study the
Probability
distribution
.
Recall that in the
relative frequency distribution
, we associated a
relative frequency
to each
class
, from the
sample data
. In a
probability distribution
, we will associate a
probability
to each
outcome
of a procedure.

Introduction
So far we have done
descriptive statistics (e.g., summarizing data,
measures of center, variation and relative standing)
and notions of
Probability
. We will combine these ideas to study the
Probability
distribution
.
Recall that in the
relative frequency distribution
, we associated a
relative frequency
to each
class
, from the
sample data
. In a
probability distribution
, we will associate a
probability
to each
outcome
of a procedure.
A probability distribution could be given,
in many situations, in the form of a table.

Introduction
So far we have done
descriptive statistics (e.g., summarizing data,
measures of center, variation and relative standing)
and notions of
Probability
. We will combine these ideas to study the
Probability
distribution
.
Recall that in the
relative frequency distribution
, we associated a
relative frequency
to each
class
, from the
sample data
. In a
probability distribution
, we will associate a
probability
to each
outcome
of a procedure.
A probability distribution could be given,
in many situations, in the form of a table.
However, we first must understand the concept of
Random
variable
.

Random variable
Random variable
: is a
variable
(typically represented by
x
) that has a single
numerical value, determined by chance, for each outcome of a procedure.